/* eslint-disable */
/*
 * canvg.js - Javascript SVG parser and renderer on Canvas
 * version 2.0.0
 * MIT Licensed
 * Gabe Lerner (gabelerner@gmail.com)
 * https://github.com/canvg/canvg
 *
 */

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('rgbcolor'), require('stackblur-canvas')) :
  typeof define === 'function' && define.amd ? define(['rgbcolor', 'stackblur-canvas'], factory) :
  (global.canvgv2 = factory(global.RGBColor,global.StackBlur));
}(this, (function (rgbcolor,stackblurCanvas) { 'use strict';

  rgbcolor = rgbcolor && rgbcolor.hasOwnProperty('default') ? rgbcolor['default'] : rgbcolor;
  stackblurCanvas = stackblurCanvas && stackblurCanvas.hasOwnProperty('default') ? stackblurCanvas['default'] : stackblurCanvas;

  function createCommonjsModule(fn, module) {
    return module = { exports: {} }, fn(module, module.exports), module.exports;
  }

  var canvg_1 = createCommonjsModule(function (module) {
  /* eslint-env browser, node */
  /* globals $, Sizzle, Windows, ActiveXObject */
  /* eslint-disable no-redeclare */


  var isNode = (module.exports && typeof window === 'undefined'),
    nodeEnv = false;
  var windowEnv;

  {
    windowEnv = window;
    windowEnv.DOMParser = window.DOMParser;
  }

  var doc = windowEnv.document,
    defaultClientWidth = 800,
    defaultClientHeight = 600;

  function createCanvas(width, height) {
    var c;
    {
      c = doc.createElement('canvas');
      c.width = width;
      c.height = height;
    }
    return c;
  }

  // canvg(target, s)
  // empty parameters: replace all 'svg' elements on page with 'canvas' elements
  // target: canvas element or the id of a canvas element
  // s: svg string, url to svg file, or xml document
  // opts: optional hash of options
  //       ignoreMouse: true => ignore mouse events
  //       ignoreAnimation: true => ignore animations
  //       ignoreDimensions: true => does not try to resize canvas
  //       ignoreClear: true => does not clear canvas
  //       offsetX: int => draws at a x offset
  //       offsetY: int => draws at a y offset
  //       scaleWidth: int => scales horizontally to width
  //       scaleHeight: int => scales vertically to height
  //       renderCallback: function => will call the function after the first render is completed
  //       enableRedraw: function => whether enable the redraw interval in node environment
  //       forceRedraw: function => will call the function on every frame, if it returns true, will redraw
  var canvg = function (target, s, opts) {
    // no parameters
    if (target == null && s == null && opts == null) {
      var svgTags = doc.querySelectorAll('svg');
      for (var i = 0; i < svgTags.length; i++) {
        var svgTag = svgTags[i];
        var c = doc.createElement('canvas');
        if (typeof(svgTag.clientWidth) !== 'undefined' && typeof(svgTag.clientHeight) !== 'undefined') {
          c.width = svgTag.clientWidth;
          c.height = svgTag.clientHeight;
        } else {
          var rect = svgTag.getBoundingClientRect();
          c.width = rect.width;
          c.height = rect.height;
        }
        svgTag.parentNode.insertBefore(c, svgTag);
        svgTag.parentNode.removeChild(svgTag);
        var div = doc.createElement('div');
        div.appendChild(svgTag);
        canvg(c, div.innerHTML);
      }
      return;
    }

    var svg = build(opts || {});

    if (typeof target == 'string') {
      target = doc.getElementById(target);
    }

    // store class on canvas
    if (target.svg != null) target.svg.stop();

    // on i.e. 8 for flash canvas, we can't assign the property so check for it
    if (!(target.childNodes && target.childNodes.length == 1 && target.childNodes[0].nodeName == 'OBJECT')) target.svg = svg;

    var ctx = target.getContext('2d');

    if (typeof s.documentElement != 'undefined') {
      // load from xml doc
      svg.loadXmlDoc(ctx, s);
    } else if (s.substr(0, 1) == '<') {
      // load from xml string
      svg.loadXml(ctx, s);
    } else {
      // load from url
      svg.load(ctx, s);
    }
  };

  var matchesSelector;
  {
    // see https://developer.mozilla.org/en-US/docs/Web/API/Element.matches
    if (typeof Element == 'undefined') ; else if (typeof Element.prototype.matches != 'undefined') {
      matchesSelector = function (node, selector) {
        return node.matches(selector);
      };
    } else if (typeof Element.prototype.webkitMatchesSelector != 'undefined') {
      matchesSelector = function (node, selector) {
        return node.webkitMatchesSelector(selector);
      };
    } else if (typeof Element.prototype.mozMatchesSelector != 'undefined') {
      matchesSelector = function (node, selector) {
        return node.mozMatchesSelector(selector);
      };
    } else if (typeof Element.prototype.msMatchesSelector != 'undefined') {
      matchesSelector = function (node, selector) {
        return node.msMatchesSelector(selector);
      };
    } else if (typeof Element.prototype.oMatchesSelector != 'undefined') {
      matchesSelector = function (node, selector) {
        return node.oMatchesSelector(selector);
      };
    } else {
      // requires Sizzle: https://github.com/jquery/sizzle/wiki/Sizzle-Documentation
      // or jQuery: http://jquery.com/download/
      // or Zepto: http://zeptojs.com/#
      // without it, this is a ReferenceError

      if (typeof jQuery === 'function' || typeof Zepto === 'function') {
        matchesSelector = function (node, selector) {
          return $(node).is(selector);
        };
      }

      if (typeof matchesSelector === 'undefined' && typeof Sizzle !== 'undefined') {
        matchesSelector = Sizzle.matchesSelector;
      }
    }
  }

  // slightly modified version of https://github.com/keeganstreet/specificity/blob/master/specificity.js
  var attributeRegex = /(\[[^\]]+\])/g;
  var idRegex = /(#[^\s\+>~\.\[:]+)/g;
  var classRegex = /(\.[^\s\+>~\.\[:]+)/g;
  var pseudoElementRegex = /(::[^\s\+>~\.\[:]+|:first-line|:first-letter|:before|:after)/gi;
  var pseudoClassWithBracketsRegex = /(:[\w-]+\([^\)]*\))/gi;
  var pseudoClassRegex = /(:[^\s\+>~\.\[:]+)/g;
  var elementRegex = /([^\s\+>~\.\[:]+)/g;

  function getSelectorSpecificity(selector) {
    var typeCount = [0, 0, 0];
    var findMatch = function (regex, type) {
      var matches = selector.match(regex);
      if (matches == null) {
        return;
      }
      typeCount[type] += matches.length;
      selector = selector.replace(regex, ' ');
    };

    selector = selector.replace(/:not\(([^\)]*)\)/g, '     $1 ');
    selector = selector.replace(/{[\s\S]*/gm, ' ');
    findMatch(attributeRegex, 1);
    findMatch(idRegex, 0);
    findMatch(classRegex, 1);
    findMatch(pseudoElementRegex, 2);
    findMatch(pseudoClassWithBracketsRegex, 1);
    findMatch(pseudoClassRegex, 1);
    selector = selector.replace(/[\*\s\+>~]/g, ' ');
    selector = selector.replace(/[#\.]/g, ' ');
    findMatch(elementRegex, 2);
    return typeCount.join('');
  }

  function build(opts) {
    var svg = { opts: opts };

    svg.FRAMERATE = 30;
    svg.MAX_VIRTUAL_PIXELS = 30000;

    svg.rootEmSize = 12;
    svg.emSize = 12;

    svg.log = function (/* msg */) { };
    if (svg.opts['log'] == true && typeof console != 'undefined') {
      svg.log = function (msg) { console.log(msg); }; // eslint-disable-line no-console
    }

    // globals
    svg.init = function (ctx) {
      var uniqueId = 0;
      svg.UniqueId = function () { uniqueId++; return 'canvg' + uniqueId; };
      svg.Definitions = {};
      svg.Styles = {};
      svg.StylesSpecificity = {};
      svg.Animations = [];
      svg.Images = [];
      svg.ctx = ctx;
      svg.ViewPort = new (function () {

        this.viewPorts = [];
        this.Clear = function () { this.viewPorts = []; };
        this.SetCurrent = function (width, height) { this.viewPorts.push({ width: width, height: height }); };
        this.RemoveCurrent = function () { this.viewPorts.pop(); };
        this.Current = function () { return this.viewPorts[this.viewPorts.length - 1]; };
        this.width = function () { return this.Current().width; };
        this.height = function () { return this.Current().height; };
        this.ComputeSize = function (d) {
          if (d != null && typeof d == 'number') return d;
          if (d == 'x') return this.width();
          if (d == 'y') return this.height();
          return Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) / Math.sqrt(2);
        };
      });
    };
    svg.init();

    // images loaded
    svg.ImagesLoaded = function () {
      for (var i = 0; i < svg.Images.length; i++) {
        if (!svg.Images[i].loaded) return false;
      }
      return true;
    };

    // trim
    svg.trim = function (s) { return s.replace(/^\s+|\s+$/g, ''); };

    // compress non-ideographic spaces
    svg.compressSpaces = function (s) { return s.replace(/(?!\u3000)\s+/gm, ' '); };

    // ajax
    svg.ajax = function (url) {
      var AJAX;
      if (windowEnv.XMLHttpRequest) { AJAX = new windowEnv.XMLHttpRequest(); } else { AJAX = new ActiveXObject('Microsoft.XMLHTTP'); }
      if (AJAX) {
        AJAX.open('GET', url, false);
        AJAX.send(null);
        return AJAX.responseText;
      }
      return null;
    };

    // parse xml
    svg.parseXml = function (xml) {
      if (typeof Windows != 'undefined' && typeof Windows.Data != 'undefined' && typeof Windows.Data.Xml != 'undefined') {
        var xmlDoc = new Windows.Data.Xml.Dom.XmlDocument();
        var settings = new Windows.Data.Xml.Dom.XmlLoadSettings();
        settings.prohibitDtd = false;
        xmlDoc.loadXml(xml, settings);
        return xmlDoc;
      } else if (windowEnv.DOMParser) {
        try {
          var parser = opts.xmldom ? new windowEnv.DOMParser(opts.xmldom) : new windowEnv.DOMParser();
          return parser.parseFromString(xml, 'image/svg+xml');
        } catch (e) {
          parser = opts.xmldom ? new windowEnv.DOMParser(opts.xmldom) : new windowEnv.DOMParser();
          return parser.parseFromString(xml, 'text/xml');
        }
      } else {
        xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '');
        var xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
        xmlDoc.async = 'false';
        xmlDoc.loadXML(xml);
        return xmlDoc;
      }
    };

    svg.Property = function (name, value) {
      this.name = name;
      this.value = value;
    };
    svg.Property.prototype.getValue = function () {
      return this.value;
    };

    svg.Property.prototype.hasValue = function () {
      return (this.value != null && this.value !== '');
    };

    // return the numerical value of the property
    svg.Property.prototype.numValue = function () {
      if (!this.hasValue()) return 0;

      var n = parseFloat(this.value);
      if ((this.value + '').match(/%$/)) {
        n = n / 100.0;
      }
      return n;
    };

    svg.Property.prototype.valueOrDefault = function (def) {
      if (this.hasValue()) return this.value;
      return def;
    };

    svg.Property.prototype.numValueOrDefault = function (def) {
      if (this.hasValue()) return this.numValue();
      return parseFloat(def);
    };

    // color extensions
    // augment the current color value with the opacity
    svg.Property.prototype.addOpacity = function (opacityProp) {
      var newValue = this.value;
      if (opacityProp.value != null && opacityProp.value != '' && typeof this.value == 'string') { // can only add opacity to colors, not patterns
        var color = new rgbcolor(this.value);
        if (color.ok) {
          newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacityProp.numValue() + ')';
        }
      }
      return new svg.Property(this.name, newValue);
    };

    // definition extensions
    // get the definition from the definitions table
    svg.Property.prototype.getDefinition = function () {
      var name = this.value.match(/#([^\)'"]+)/);
      if (name) { name = name[1]; }
      if (!name) { name = this.value; }
      return svg.Definitions[name];
    };

    svg.Property.prototype.isUrlDefinition = function () {
      return this.value.indexOf('url(') == 0
    };

    svg.Property.prototype.getFillStyleDefinition = function (e, opacityProp) {
      var def = this.getDefinition();

      // gradient
      if (def != null && def.createGradient) {
        return def.createGradient(svg.ctx, e, opacityProp);
      }

      // pattern
      if (def != null && def.createPattern) {
        if (def.getHrefAttribute().hasValue()) {
          var pt = def.attribute('patternTransform');
          def = def.getHrefAttribute().getDefinition();
          if (pt.hasValue()) { def.attribute('patternTransform', true).value = pt.value; }
        }
        return def.createPattern(svg.ctx, e, opacityProp);
      }

      return null;
    };

    // length extensions
    svg.Property.prototype.getDPI = function (/* viewPort */) {
      return 96.0; // TODO: compute?
    };

    svg.Property.prototype.getREM = function (/* viewPort */) {
      return svg.rootEmSize;
    };

    svg.Property.prototype.getEM = function (/* viewPort */) {
      return svg.emSize;
    };

    svg.Property.prototype.getUnits = function () {
      var s = this.value + '';
      return s.replace(/[0-9\.\-]/g, '');
    };

    svg.Property.prototype.isPixels = function () {
      if (!this.hasValue()) return false;
      var s = this.value + '';
      if (s.match(/px$/)) return true;
      if (s.match(/^[0-9]+$/)) return true;
      return false;
    };

    // get the length as pixels
    svg.Property.prototype.toPixels = function (viewPort, processPercent) {
      if (!this.hasValue()) return 0;
      var s = this.value + '';
      if (s.match(/rem$/)) return this.numValue() * this.getREM(viewPort);
      if (s.match(/em$/)) return this.numValue() * this.getEM(viewPort);
      if (s.match(/ex$/)) return this.numValue() * this.getEM(viewPort) / 2.0;
      if (s.match(/px$/)) return this.numValue();
      if (s.match(/pt$/)) return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0);
      if (s.match(/pc$/)) return this.numValue() * 15;
      if (s.match(/cm$/)) return this.numValue() * this.getDPI(viewPort) / 2.54;
      if (s.match(/mm$/)) return this.numValue() * this.getDPI(viewPort) / 25.4;
      if (s.match(/in$/)) return this.numValue() * this.getDPI(viewPort);
      if (s.match(/%$/)) return this.numValue() * svg.ViewPort.ComputeSize(viewPort);
      var n = this.numValue();
      if (processPercent && n < 1.0) return n * svg.ViewPort.ComputeSize(viewPort);
      return n;
    };

    // time extensions
    // get the time as milliseconds
    // https://svgwg.org/specs/animations/#ClockValueSyntax
    svg.Property.prototype.toMilliseconds = function () {
      if (!this.hasValue()) return 0;
      var s = this.value + '';
      if (s.match(/ms$/)) return this.numValue();
      return this.numValue() * 1000;
    };

    // angle extensions
    // get the angle as radians
    svg.Property.prototype.toRadians = function () {
      if (!this.hasValue()) return 0;
      var s = this.value + '';
      if (s.match(/deg$/)) return this.numValue() * (Math.PI / 180.0);
      if (s.match(/grad$/)) return this.numValue() * (Math.PI / 200.0);
      if (s.match(/rad$/)) return this.numValue();
      return this.numValue() * (Math.PI / 180.0);
    };

    // text extensions
    // get the text baseline
    var textBaselineMapping = {
      'baseline': 'alphabetic',
      'before-edge': 'top',
      'text-before-edge': 'top',
      'middle': 'middle',
      'central': 'middle',
      'after-edge': 'bottom',
      'text-after-edge': 'bottom',
      'ideographic': 'ideographic',
      'alphabetic': 'alphabetic',
      'hanging': 'hanging',
      'mathematical': 'alphabetic'
    };
    svg.Property.prototype.toTextBaseline = function () {
      if (!this.hasValue()) return null;
      return textBaselineMapping[this.value];
    };

    // fonts
    svg.Font = new (function () {
      this.Styles = 'normal|italic|oblique|inherit';
      this.Variants = 'normal|small-caps|inherit';
      this.Weights = 'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit';

      this.CreateFont = function (fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) {
        var f = inherit != null ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font);
        fontFamily = fontFamily || f.fontFamily;
        return {
          fontFamily: fontFamily,
          fontSize: fontSize || f.fontSize,
          fontStyle: fontStyle || f.fontStyle,
          fontWeight: fontWeight || f.fontWeight,
          fontVariant: fontVariant || f.fontVariant,
          toString: function () { return [this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily].join(' ') }
        }
      };

      var that = this;
      this.Parse = function (s) {
        var f = {};
        var d = svg.trim(svg.compressSpaces(s || '')).split(' ');
        var set = { fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false };
        var ff = '';
        for (var i = 0; i < d.length; i++) {
          if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) {
            if (d[i] != 'inherit') f.fontStyle = d[i];
            set.fontStyle = true;
          } else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) {
            if (d[i] != 'inherit') f.fontVariant = d[i];
            set.fontStyle = set.fontVariant = true;
          } else if (!set.fontWeight && that.Weights.indexOf(d[i]) != -1) {
            if (d[i] != 'inherit') f.fontWeight = d[i];
            set.fontStyle = set.fontVariant = set.fontWeight = true;
          } else if (!set.fontSize) {
            if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0];
            set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true;
          } else { if (d[i] != 'inherit') ff += d[i]; }
        }
        if (ff != '') f.fontFamily = ff;
        return f;
      };
    });

    // points and paths
    svg.ToNumberArray = function (s) {
      var a = (s || '').match(/-?(\d+(?:\.\d*(?:[eE][+-]?\d+)?)?|\.\d+)(?=\D|$)/gm) || [];
      for (var i = 0; i < a.length; i++) {
        a[i] = parseFloat(a[i]);
      }
      return a;
    };
    svg.Point = function (x, y) {
      this.x = x;
      this.y = y;
    };
    svg.Point.prototype.angleTo = function (p) {
      return Math.atan2(p.y - this.y, p.x - this.x);
    };

    svg.Point.prototype.applyTransform = function (v) {
      var xp = this.x * v[0] + this.y * v[2] + v[4];
      var yp = this.x * v[1] + this.y * v[3] + v[5];
      this.x = xp;
      this.y = yp;
    };

    svg.CreatePoint = function (s) {
      var a = svg.ToNumberArray(s);
      return new svg.Point(a[0], a[1]);
    };
    svg.CreatePath = function (s) {
      var a = svg.ToNumberArray(s);
      var path = [];
      for (var i = 0; i < a.length; i += 2) {
        path.push(new svg.Point(a[i], a[i + 1]));
      }
      return path;
    };

    // bounding box
    svg.BoundingBox = function (x1, y1, x2, y2) { // pass in initial points if you want
      this.x1 = Number.NaN;
      this.y1 = Number.NaN;
      this.x2 = Number.NaN;
      this.y2 = Number.NaN;

      this.x = function () { return this.x1; };
      this.y = function () { return this.y1; };
      this.width = function () { return this.x2 - this.x1; };
      this.height = function () { return this.y2 - this.y1; };

      this.addPoint = function (x, y) {
        if (x != null) {
          if (isNaN(this.x1) || isNaN(this.x2)) {
            this.x1 = x;
            this.x2 = x;
          }
          if (x < this.x1) this.x1 = x;
          if (x > this.x2) this.x2 = x;
        }

        if (y != null) {
          if (isNaN(this.y1) || isNaN(this.y2)) {
            this.y1 = y;
            this.y2 = y;
          }
          if (y < this.y1) this.y1 = y;
          if (y > this.y2) this.y2 = y;
        }
      };
      this.addX = function (x) { this.addPoint(x, null); };
      this.addY = function (y) { this.addPoint(null, y); };

      this.addBoundingBox = function (bb) {
        this.addPoint(bb.x1, bb.y1);
        this.addPoint(bb.x2, bb.y2);
      };

      this.addQuadraticCurve = function (p0x, p0y, p1x, p1y, p2x, p2y) {
        var cp1x = p0x + 2 / 3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0)
        var cp1y = p0y + 2 / 3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0)
        var cp2x = cp1x + 1 / 3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0)
        var cp2y = cp1y + 1 / 3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0)
        this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y);
      };

      this.addBezierCurve = function (p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
        // from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
        var p0 = [p0x, p0y],
          p1 = [p1x, p1y],
          p2 = [p2x, p2y],
          p3 = [p3x, p3y];
        this.addPoint(p0[0], p0[1]);
        this.addPoint(p3[0], p3[1]);

        for (var i = 0; i <= 1; i++) {
          var f = function (t) {
            return Math.pow(1 - t, 3) * p0[i] +
              3 * Math.pow(1 - t, 2) * t * p1[i] +
              3 * (1 - t) * Math.pow(t, 2) * p2[i] +
              Math.pow(t, 3) * p3[i];
          };

          var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
          var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
          var c = 3 * p1[i] - 3 * p0[i];

          if (a == 0) {
            if (b == 0) continue;
            var t = -c / b;
            if (0 < t && t < 1) {
              if (i == 0) this.addX(f(t));
              if (i == 1) this.addY(f(t));
            }
            continue;
          }

          var b2ac = Math.pow(b, 2) - 4 * c * a;
          if (b2ac < 0) continue;
          var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
          if (0 < t1 && t1 < 1) {
            if (i == 0) this.addX(f(t1));
            if (i == 1) this.addY(f(t1));
          }
          var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
          if (0 < t2 && t2 < 1) {
            if (i == 0) this.addX(f(t2));
            if (i == 1) this.addY(f(t2));
          }
        }
      };

      this.isPointInBox = function (x, y) {
        return (this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2);
      };

      this.addPoint(x1, y1);
      this.addPoint(x2, y2);
    };

    // transforms
    svg.Transform = function (v) {
      var that = this;
      this.Type = {};

      // translate
      this.Type.translate = function (s) {
        this.p = svg.CreatePoint(s);
        this.apply = function (ctx) {
          ctx.translate(this.p.x || 0.0, this.p.y || 0.0);
        };
        this.unapply = function (ctx) {
          ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0);
        };
        this.applyToPoint = function (p) {
          p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
        };
      };

      // rotate
      this.Type.rotate = function (s) {
        var a = svg.ToNumberArray(s);
        this.angle = new svg.Property('angle', a[0]);
        this.cx = a[1] || 0;
        this.cy = a[2] || 0;
        this.apply = function (ctx) {
          ctx.translate(this.cx, this.cy);
          ctx.rotate(this.angle.toRadians());
          ctx.translate(-this.cx, -this.cy);
        };
        this.unapply = function (ctx) {
          ctx.translate(this.cx, this.cy);
          ctx.rotate(-1.0 * this.angle.toRadians());
          ctx.translate(-this.cx, -this.cy);
        };
        this.applyToPoint = function (p) {
          var a = this.angle.toRadians();
          p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
          p.applyTransform([Math.cos(a), Math.sin(a), -Math.sin(a), Math.cos(a), 0, 0]);
          p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0]);
        };
      };

      this.Type.scale = function (s) {
        this.p = svg.CreatePoint(s);
        this.apply = function (ctx) {
          ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0);
        };
        this.unapply = function (ctx) {
          ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0);
        };
        this.applyToPoint = function (p) {
          p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0]);
        };
      };

      this.Type.matrix = function (s) {
        this.m = svg.ToNumberArray(s);
        this.apply = function (ctx) {
          ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
        };
        this.unapply = function (ctx) {
          var a = this.m[0];
          var b = this.m[2];
          var c = this.m[4];
          var d = this.m[1];
          var e = this.m[3];
          var f = this.m[5];
          var g = 0.0;
          var h = 0.0;
          var i = 1.0;
          var det = 1 / (a * (e * i - f * h) - b * (d * i - f * g) + c * (d * h - e * g));
          ctx.transform(
            det * (e * i - f * h),
            det * (f * g - d * i),
            det * (c * h - b * i),
            det * (a * i - c * g),
            det * (b * f - c * e),
            det * (c * d - a * f)
          );
        };
        this.applyToPoint = function (p) {
          p.applyTransform(this.m);
        };
      };

      this.Type.SkewBase = function (s) {
        this.base = that.Type.matrix;
        this.base(s);
        this.angle = new svg.Property('angle', s);
      };
      this.Type.SkewBase.prototype = new this.Type.matrix;

      this.Type.skewX = function (s) {
        this.base = that.Type.SkewBase;
        this.base(s);
        this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0];
      };
      this.Type.skewX.prototype = new this.Type.SkewBase;

      this.Type.skewY = function (s) {
        this.base = that.Type.SkewBase;
        this.base(s);
        this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0];
      };
      this.Type.skewY.prototype = new this.Type.SkewBase;

      this.transforms = [];

      this.apply = function (ctx) {
        for (var i = 0; i < this.transforms.length; i++) {
          this.transforms[i].apply(ctx);
        }
      };

      this.unapply = function (ctx) {
        for (var i = this.transforms.length - 1; i >= 0; i--) {
          this.transforms[i].unapply(ctx);
        }
      };

      // TODO: applyToPoint unused ... remove?
      this.applyToPoint = function (p) {
        for (var i = 0; i < this.transforms.length; i++) {
          this.transforms[i].applyToPoint(p);
        }
      };

      var data = svg.trim(svg.compressSpaces(v)).replace(/\)([a-zA-Z])/g, ') $1').replace(/\)(\s?,\s?)/g, ') ').split(/\s(?=[a-z])/);
      for (var i = 0; i < data.length; i++) {
        if (data[i] === 'none') {
          continue;
        }

        var type = svg.trim(data[i].split('(')[0]);
        var s = data[i].split('(')[1].replace(')', '');
        var transformType = this.Type[type];
        if (typeof transformType != 'undefined') {
          var transform = new transformType(s);
          transform.type = type;
          this.transforms.push(transform);
        }
      }
    };

    // aspect ratio
    svg.AspectRatio = function (ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) {
      // aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
      aspectRatio = svg.compressSpaces(aspectRatio);
      aspectRatio = aspectRatio.replace(/^defer\s/, ''); // ignore defer
      var align = aspectRatio.split(' ')[0] || 'xMidYMid';
      var meetOrSlice = aspectRatio.split(' ')[1] || 'meet';

      // calculate scale
      var scaleX = width / desiredWidth;
      var scaleY = height / desiredHeight;
      var scaleMin = Math.min(scaleX, scaleY);
      var scaleMax = Math.max(scaleX, scaleY);
      if (meetOrSlice == 'meet') {
        desiredWidth *= scaleMin;
        desiredHeight *= scaleMin;
      }
      if (meetOrSlice == 'slice') {
        desiredWidth *= scaleMax;
        desiredHeight *= scaleMax;
      }

      refX = new svg.Property('refX', refX);
      refY = new svg.Property('refY', refY);
      if (refX.hasValue() && refY.hasValue()) {
        ctx.translate(-scaleMin * refX.toPixels('x'), -scaleMin * refY.toPixels('y'));
      } else {
        // align
        if (align.match(/^xMid/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width / 2.0 - desiredWidth / 2.0, 0);
        if (align.match(/YMid$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height / 2.0 - desiredHeight / 2.0);
        if (align.match(/^xMax/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width - desiredWidth, 0);
        if (align.match(/YMax$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height - desiredHeight);
      }

      // scale
      if (align == 'none') ctx.scale(scaleX, scaleY);
      else if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin);
      else if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax);

      // translate
      ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY);
    };

    // elements
    svg.Element = {};

    svg.EmptyProperty = new svg.Property('EMPTY', '');

    svg.Element.ElementBase = function (node) {
      this.attributes = {};
      this.styles = {};
      this.stylesSpecificity = {};
      this.children = [];

      // get or create attribute
      this.attribute = function (name, createIfNotExists) {
        var a = this.attributes[name];
        if (a != null) return a;

        if (createIfNotExists == true) {
          a = new svg.Property(name, '');
          this.attributes[name] = a;
        }
        return a || svg.EmptyProperty;
      };

      this.getHrefAttribute = function () {
        for (var a in this.attributes) {
          if (a == 'href' || a.match(/:href$/)) {
            return this.attributes[a];
          }
        }
        return svg.EmptyProperty;
      };

      // get or create style, crawls up node tree
      this.style = function (name, createIfNotExists, skipAncestors) {
        var s = this.styles[name];
        if (s != null) return s;

        var a = this.attribute(name);
        if (a != null && a.hasValue()) {
          this.styles[name] = a; // move up to me to cache
          return a;
        }

        if (skipAncestors != true) {
          var p = this.parent;
          if (p != null) {
            var ps = p.style(name);
            if (ps != null && ps.hasValue()) {
              return ps;
            }
          }
        }

        if (createIfNotExists == true) {
          s = new svg.Property(name, '');
          this.styles[name] = s;
        }
        return s || svg.EmptyProperty;
      };

      // base render
      this.render = function (ctx) {
        // don't render display=none
        if (this.style('display').value == 'none') return;

        // don't render visibility=hidden
        if (this.style('visibility').value == 'hidden') return;

        ctx.save();
        if (this.style('mask').hasValue()) { // mask
          var mask = this.style('mask').getDefinition();
          if (mask != null) mask.apply(ctx, this);
        } else if (this.style('filter').hasValue()) { // filter
          var filter = this.style('filter').getDefinition();
          if (filter != null) filter.apply(ctx, this);
        } else {
          this.setContext(ctx);
          this.renderChildren(ctx);
          this.clearContext(ctx);
        }
        ctx.restore();
      };

      // base set context
      this.setContext = function (/* ctx */) {
        // OVERRIDE ME!
      };

      // base clear context
      this.clearContext = function (/* ctx */) {
        // OVERRIDE ME!
      };

      // base render children
      this.renderChildren = function (ctx) {
        for (var i = 0; i < this.children.length; i++) {
          this.children[i].render(ctx);
        }
      };

      this.addChild = function (childNode, create) {
        var child = childNode;
        if (create) child = svg.CreateElement(childNode);
        child.parent = this;
        if (child.type != 'title') { this.children.push(child); }
      };

      this.addStylesFromStyleDefinition = function () {
        // add styles
        for (var selector in svg.Styles) {
          if (selector[0] != '@' && matchesSelector(node, selector)) {
            var styles = svg.Styles[selector];
            var specificity = svg.StylesSpecificity[selector];
            if (styles != null) {
              for (var name in styles) {
                var existingSpecificity = this.stylesSpecificity[name];
                if (typeof existingSpecificity == 'undefined') {
                  existingSpecificity = '000';
                }
                if (specificity >= existingSpecificity) {
                  this.styles[name] = styles[name];
                  this.stylesSpecificity[name] = specificity;
                }
              }
            }
          }
        }
      };

      // Microsoft Edge fix
      var allUppercase = new RegExp('^[A-Z\-]+$');
      var normalizeAttributeName = function (name) {
        if (allUppercase.test(name)) {
          return name.toLowerCase();
        }
        return name;
      };

      if (node != null && node.nodeType == 1) { //ELEMENT_NODE
        // add attributes
        for (var i = 0; i < node.attributes.length; i++) {
          var attribute = node.attributes[i];
          var nodeName = normalizeAttributeName(attribute.nodeName);
          this.attributes[nodeName] = new svg.Property(nodeName, attribute.value);
        }

        this.addStylesFromStyleDefinition();

        // add inline styles
        if (this.attribute('style').hasValue()) {
          var styles = this.attribute('style').value.split(';');
          for (var i = 0; i < styles.length; i++) {
            if (svg.trim(styles[i]) != '') {
              var style = styles[i].split(':');
              var name = svg.trim(style[0]);
              var value = svg.trim(style[1]);
              this.styles[name] = new svg.Property(name, value);
            }
          }
        }

        // add id
        if (this.attribute('id').hasValue()) {
          if (svg.Definitions[this.attribute('id').value] == null) {
            svg.Definitions[this.attribute('id').value] = this;
          }
        }

        // add children
        for (var i = 0; i < node.childNodes.length; i++) {
          var childNode = node.childNodes[i];
          if (childNode.nodeType == 1) this.addChild(childNode, true); //ELEMENT_NODE
          if (this.captureTextNodes && (childNode.nodeType == 3 || childNode.nodeType == 4)) {
            var text = childNode.value || childNode.text || childNode.textContent || '';
            if (svg.compressSpaces(text) != '') {
              this.addChild(new svg.Element.tspan(childNode), false); // TEXT_NODE
            }
          }
        }
      }
    };

    svg.Element.RenderedElementBase = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.calculateOpacity = function() {
        var opacity = 1.0;

        var el = this;
        while (el != null) {
          var opacityStyle = el.style('opacity', false, true); // no ancestors on style call
          if (opacityStyle.hasValue()) {
            opacity = opacity * opacityStyle.numValue();
          }
          el = el.parent;
        }

        return opacity;
      };

      this.setContext = function (ctx, fromMeasure) {
        if (!fromMeasure) { // causes stack overflow when measuring text with gradients
          // fill
          if (this.style('fill').isUrlDefinition()) {
            var fs = this.style('fill').getFillStyleDefinition(this, this.style('fill-opacity'));
            if (fs != null) ctx.fillStyle = fs;
          } else if (this.style('fill').hasValue()) {
            var fillStyle = this.style('fill');
            if (fillStyle.value == 'currentColor') fillStyle.value = this.style('color').value;
            if (fillStyle.value != 'inherit') ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
          }
          if (this.style('fill-opacity').hasValue()) {
            var fillStyle = new svg.Property('fill', ctx.fillStyle);
            fillStyle = fillStyle.addOpacity(this.style('fill-opacity'));
            ctx.fillStyle = fillStyle.value;
          }

          // stroke
          if (this.style('stroke').isUrlDefinition()) {
            var fs = this.style('stroke').getFillStyleDefinition(this, this.style('stroke-opacity'));
            if (fs != null) ctx.strokeStyle = fs;
          } else if (this.style('stroke').hasValue()) {
            var strokeStyle = this.style('stroke');
            if (strokeStyle.value == 'currentColor') strokeStyle.value = this.style('color').value;
            if (strokeStyle.value != 'inherit') ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
          }
          if (this.style('stroke-opacity').hasValue()) {
            var strokeStyle = new svg.Property('stroke', ctx.strokeStyle);
            strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity'));
            ctx.strokeStyle = strokeStyle.value;
          }
          if (this.style('stroke-width').hasValue()) {
            var newLineWidth = this.style('stroke-width').toPixels();
            ctx.lineWidth = newLineWidth == 0 ? 0.001 : newLineWidth; // browsers don't respect 0
          }
          if (this.style('stroke-linecap').hasValue()) ctx.lineCap = this.style('stroke-linecap').value;
          if (this.style('stroke-linejoin').hasValue()) ctx.lineJoin = this.style('stroke-linejoin').value;
          if (this.style('stroke-miterlimit').hasValue()) ctx.miterLimit = this.style('stroke-miterlimit').value;
          if (this.style('paint-order').hasValue()) ctx.paintOrder = this.style('paint-order').value;
          if (this.style('stroke-dasharray').hasValue() && this.style('stroke-dasharray').value != 'none') {
            var gaps = svg.ToNumberArray(this.style('stroke-dasharray').value);
            if (typeof ctx.setLineDash != 'undefined') { ctx.setLineDash(gaps); } else if (typeof ctx.webkitLineDash != 'undefined') { ctx.webkitLineDash = gaps; } else if (typeof ctx.mozDash != 'undefined' && !(gaps.length == 1 && gaps[0] == 0)) { ctx.mozDash = gaps; }

            var offset = this.style('stroke-dashoffset').toPixels();
            if (typeof ctx.lineDashOffset != 'undefined') { ctx.lineDashOffset = offset; } else if (typeof ctx.webkitLineDashOffset != 'undefined') { ctx.webkitLineDashOffset = offset; } else if (typeof ctx.mozDashOffset != 'undefined') { ctx.mozDashOffset = offset; }
          }
        }

        // font
        if (typeof ctx.font != 'undefined') {
          if (this.style('font').hasValue()) {
            ctx.font = this.style('font').value;
          } else {
            ctx.font = svg.Font.CreateFont(
              this.style('font-style').value,
              this.style('font-variant').value,
              this.style('font-weight').value,
              this.style('font-size').hasValue() ? this.style('font-size').toPixels() + 'px' : '',
              this.style('font-family').value).toString();

            // update em size if needed
            var currentFontSize = this.style('font-size', false, false);
            if (currentFontSize.isPixels()) {
              svg.emSize = currentFontSize.toPixels();
            }
          }
        }

        // transform
        if (this.style('transform', false, true).hasValue()) {
          var transform = new svg.Transform(this.style('transform', false, true).value);
          transform.apply(ctx);
        }

        // clip
        if (this.style('clip-path', false, true).hasValue()) {
          var clip = this.style('clip-path', false, true).getDefinition();
          if (clip != null) clip.apply(ctx);
        }

        // opacity
        ctx.globalAlpha = this.calculateOpacity();
      };
    };
    svg.Element.RenderedElementBase.prototype = new svg.Element.ElementBase;

    svg.Element.PathElementBase = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.path = function (ctx) {
        if (ctx != null) ctx.beginPath();
        return new svg.BoundingBox();
      };

      this.renderChildren = function (ctx) {
        this.path(ctx);
        svg.Mouse.checkPath(this, ctx);
        if (ctx.fillStyle != '') {
          if (this.style('fill-rule').valueOrDefault('inherit') != 'inherit') { ctx.fill(this.style('fill-rule').value); } else { ctx.fill(); }
        }
        if (ctx.strokeStyle != '') ctx.stroke();

        var markers = this.getMarkers();
        if (markers != null) {
          if (this.style('marker-start').isUrlDefinition()) {
            var marker = this.style('marker-start').getDefinition();
            marker.render(ctx, markers[0][0], markers[0][1]);
          }
          if (this.style('marker-mid').isUrlDefinition()) {
            var marker = this.style('marker-mid').getDefinition();
            for (var i = 1; i < markers.length - 1; i++) {
              marker.render(ctx, markers[i][0], markers[i][1]);
            }
          }
          if (this.style('marker-end').isUrlDefinition()) {
            var marker = this.style('marker-end').getDefinition();
            marker.render(ctx, markers[markers.length - 1][0], markers[markers.length - 1][1]);
          }
        }
      };

      this.getBoundingBox = function () {
        return this.path();
      };

      this.getMarkers = function () {
        return null;
      };
    };
    svg.Element.PathElementBase.prototype = new svg.Element.RenderedElementBase;

    svg.SetDefaults = function (ctx) {
      // initial values and defaults
      ctx.strokeStyle = 'rgba(0,0,0,0)';
      ctx.lineCap = 'butt';
      ctx.lineJoin = 'miter';
      ctx.miterLimit = 4;
    };

    // svg element
    svg.Element.svg = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.baseClearContext = this.clearContext;
      this.clearContext = function (ctx) {
        this.baseClearContext(ctx);
        svg.ViewPort.RemoveCurrent();
      };

      this.baseSetContext = this.setContext;
      this.setContext = function (ctx) {
        svg.SetDefaults(ctx);
        if (ctx.canvas.style && typeof ctx.font != 'undefined' && typeof windowEnv.getComputedStyle != 'undefined') {
          ctx.font = windowEnv.getComputedStyle(ctx.canvas).getPropertyValue('font');

          var fontSize = new svg.Property('fontSize', svg.Font.Parse(ctx.font).fontSize);
          if (fontSize.hasValue()) svg.rootEmSize = svg.emSize = fontSize.toPixels('y');
        }

        this.baseSetContext(ctx);

        // create new view port
        if (!this.attribute('x').hasValue()) this.attribute('x', true).value = 0;
        if (!this.attribute('y').hasValue()) this.attribute('y', true).value = 0;
        ctx.translate(this.attribute('x').toPixels('x'), this.attribute('y').toPixels('y'));

        var width = svg.ViewPort.width();
        var height = svg.ViewPort.height();

        if (!this.attribute('width').hasValue()) this.attribute('width', true).value = '100%';
        if (!this.attribute('height').hasValue()) this.attribute('height', true).value = '100%';
        if (typeof this.root == 'undefined') {
          width = this.attribute('width').toPixels('x');
          height = this.attribute('height').toPixels('y');

          var x = 0;
          var y = 0;
          if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
            x = -this.attribute('refX').toPixels('x');
            y = -this.attribute('refY').toPixels('y');
          }

          if (this.attribute('overflow').valueOrDefault('hidden') != 'visible') {
            ctx.beginPath();
            ctx.moveTo(x, y);
            ctx.lineTo(width, y);
            ctx.lineTo(width, height);
            ctx.lineTo(x, height);
            ctx.closePath();
            ctx.clip();
          }
        }
        svg.ViewPort.SetCurrent(width, height);

        // viewbox
        if (this.attribute('viewBox').hasValue()) {
          var viewBox = svg.ToNumberArray(this.attribute('viewBox').value);
          var minX = viewBox[0];
          var minY = viewBox[1];
          width = viewBox[2];
          height = viewBox[3];

          svg.AspectRatio(ctx,
            this.attribute('preserveAspectRatio').value,
            svg.ViewPort.width(),
            width,
            svg.ViewPort.height(),
            height,
            minX,
            minY,
            this.attribute('refX').value,
            this.attribute('refY').value);

          svg.ViewPort.RemoveCurrent();
          svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);
        }
      };
    };
    svg.Element.svg.prototype = new svg.Element.RenderedElementBase;

    // rect element
    svg.Element.rect = function (node) {
      this.base = svg.Element.PathElementBase;
      this.base(node);

      this.path = function (ctx) {
        var x = this.attribute('x').toPixels('x');
        var y = this.attribute('y').toPixels('y');
        var width = this.attribute('width').toPixels('x');
        var height = this.attribute('height').toPixels('y');
        var rx = this.attribute('rx').toPixels('x');
        var ry = this.attribute('ry').toPixels('y');
        if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
        if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;
        rx = Math.min(rx, width / 2.0);
        ry = Math.min(ry, height / 2.0);

        if (ctx != null) {
          var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
          ctx.beginPath(); // always start the path so we don't fill prior paths
          if (height > 0 && width > 0) {
            ctx.moveTo(x + rx, y);
            ctx.lineTo(x + width - rx, y);
            ctx.bezierCurveTo(x + width - rx + (KAPPA * rx), y, x + width, y + ry - (KAPPA * ry), x + width, y + ry);
            ctx.lineTo(x + width, y + height - ry);
            ctx.bezierCurveTo(x + width, y + height - ry + (KAPPA * ry), x + width - rx + (KAPPA * rx), y + height, x + width - rx, y + height);
            ctx.lineTo(x + rx, y + height);
            ctx.bezierCurveTo(x + rx - (KAPPA * rx), y + height, x, y + height - ry + (KAPPA * ry), x, y + height - ry);
            ctx.lineTo(x, y + ry);
            ctx.bezierCurveTo(x, y + ry - (KAPPA * ry), x + rx - (KAPPA * rx), y, x + rx, y);
            ctx.closePath();
          }
        }

        return new svg.BoundingBox(x, y, x + width, y + height);
      };
    };
    svg.Element.rect.prototype = new svg.Element.PathElementBase;

    // circle element
    svg.Element.circle = function (node) {
      this.base = svg.Element.PathElementBase;
      this.base(node);

      this.path = function (ctx) {
        var cx = this.attribute('cx').toPixels('x');
        var cy = this.attribute('cy').toPixels('y');
        var r = this.attribute('r').toPixels();

        if (ctx != null && r > 0) {
          ctx.beginPath();
          ctx.arc(cx, cy, r, 0, Math.PI * 2, false);
          ctx.closePath();
        }

        return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r);
      };
    };
    svg.Element.circle.prototype = new svg.Element.PathElementBase;

    // ellipse element
    svg.Element.ellipse = function (node) {
      this.base = svg.Element.PathElementBase;
      this.base(node);

      this.path = function (ctx) {
        var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
        var rx = this.attribute('rx').toPixels('x');
        var ry = this.attribute('ry').toPixels('y');
        var cx = this.attribute('cx').toPixels('x');
        var cy = this.attribute('cy').toPixels('y');

        if (ctx != null) {
          ctx.beginPath();
          ctx.moveTo(cx + rx, cy);
          ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry);
          ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy);
          ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry);
          ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry, cx + rx, cy - (KAPPA * ry), cx + rx, cy);
          ctx.closePath();
        }

        return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry);
      };
    };
    svg.Element.ellipse.prototype = new svg.Element.PathElementBase;

    // line element
    svg.Element.line = function (node) {
      this.base = svg.Element.PathElementBase;
      this.base(node);

      this.getPoints = function () {
        return [
          new svg.Point(this.attribute('x1').toPixels('x'), this.attribute('y1').toPixels('y')),
          new svg.Point(this.attribute('x2').toPixels('x'), this.attribute('y2').toPixels('y'))
        ];
      };

      this.path = function (ctx) {
        var points = this.getPoints();

        if (ctx != null) {
          ctx.beginPath();
          ctx.moveTo(points[0].x, points[0].y);
          ctx.lineTo(points[1].x, points[1].y);
        }

        return new svg.BoundingBox(points[0].x, points[0].y, points[1].x, points[1].y);
      };

      this.getMarkers = function () {
        var points = this.getPoints();
        var a = points[0].angleTo(points[1]);
        return [
          [points[0], a],
          [points[1], a]
        ];
      };
    };
    svg.Element.line.prototype = new svg.Element.PathElementBase;

    // polyline element
    svg.Element.polyline = function (node) {
      this.base = svg.Element.PathElementBase;
      this.base(node);

      this.points = svg.CreatePath(this.attribute('points').value);
      this.path = function (ctx) {
        var bb = new svg.BoundingBox(this.points[0].x, this.points[0].y);
        if (ctx != null) {
          ctx.beginPath();
          ctx.moveTo(this.points[0].x, this.points[0].y);
        }
        for (var i = 1; i < this.points.length; i++) {
          bb.addPoint(this.points[i].x, this.points[i].y);
          if (ctx != null) ctx.lineTo(this.points[i].x, this.points[i].y);
        }
        return bb;
      };

      this.getMarkers = function () {
        var markers = [];
        for (var i = 0; i < this.points.length - 1; i++) {
          markers.push([this.points[i], this.points[i].angleTo(this.points[i + 1])]);
        }
        if (markers.length > 0) {
          markers.push([this.points[this.points.length - 1], markers[markers.length - 1][1]]);
        }
        return markers;
      };
    };
    svg.Element.polyline.prototype = new svg.Element.PathElementBase;

    // polygon element
    svg.Element.polygon = function (node) {
      this.base = svg.Element.polyline;
      this.base(node);

      this.basePath = this.path;
      this.path = function (ctx) {
        var bb = this.basePath(ctx);
        if (ctx != null) {
          ctx.lineTo(this.points[0].x, this.points[0].y);
          ctx.closePath();
        }
        return bb;
      };
    };
    svg.Element.polygon.prototype = new svg.Element.polyline;

    // path element
    svg.Element.path = function (node) {
      this.base = svg.Element.PathElementBase;
      this.base(node);

      var d = this.attribute('d').value;
      // TODO: convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
      d = d.replace(/,/gm, ' '); // get rid of all commas
      // As the end of a match can also be the start of the next match, we need to run this replace twice.
      for (var i = 0; i < 2; i++)
        d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([^\s])/gm, '$1 $2'); // suffix commands with spaces
      d = d.replace(/([^\s])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2'); // prefix commands with spaces
      d = d.replace(/([0-9])([+\-])/gm, '$1 $2'); // separate digits on +- signs
      // Again, we need to run this twice to find all occurances
      for (var i = 0; i < 2; i++)
        d = d.replace(/(\.[0-9]*)(\.)/gm, '$1 $2'); // separate digits when they start with a comma
      d = d.replace(/([Aa](\s+[0-9]+){3})\s+([01])\s*([01])/gm, '$1 $3 $4 '); // shorthand elliptical arc path syntax
      d = svg.compressSpaces(d); // compress multiple spaces
      d = svg.trim(d);
      this.PathParser = new (function (d) {
        this.tokens = d.split(' ');

        this.reset = function () {
          this.i = -1;
          this.command = '';
          this.previousCommand = '';
          this.start = new svg.Point(0, 0);
          this.control = new svg.Point(0, 0);
          this.current = new svg.Point(0, 0);
          this.points = [];
          this.angles = [];
        };

        this.isEnd = function () {
          return this.i >= this.tokens.length - 1;
        };

        this.isCommandOrEnd = function () {
          if (this.isEnd()) return true;
          return this.tokens[this.i + 1].match(/^[A-Za-z]$/) != null;
        };

        this.isRelativeCommand = function () {
          switch (this.command) {
            case 'm':
            case 'l':
            case 'h':
            case 'v':
            case 'c':
            case 's':
            case 'q':
            case 't':
            case 'a':
            case 'z':
              return true;
          }
          return false;
        };

        this.getToken = function () {
          this.i++;
          return this.tokens[this.i];
        };

        this.getScalar = function () {
          return parseFloat(this.getToken());
        };

        this.nextCommand = function () {
          this.previousCommand = this.command;
          this.command = this.getToken();
        };

        this.getPoint = function () {
          var p = new svg.Point(this.getScalar(), this.getScalar());
          return this.makeAbsolute(p);
        };

        this.getAsControlPoint = function () {
          var p = this.getPoint();
          this.control = p;
          return p;
        };

        this.getAsCurrentPoint = function () {
          var p = this.getPoint();
          this.current = p;
          return p;
        };

        this.getReflectedControlPoint = function () {
          if (this.previousCommand.toLowerCase() != 'c' &&
            this.previousCommand.toLowerCase() != 's' &&
            this.previousCommand.toLowerCase() != 'q' &&
            this.previousCommand.toLowerCase() != 't') {
            return this.current;
          }

          // reflect point
          var p = new svg.Point(2 * this.current.x - this.control.x, 2 * this.current.y - this.control.y);
          return p;
        };

        this.makeAbsolute = function (p) {
          if (this.isRelativeCommand()) {
            p.x += this.current.x;
            p.y += this.current.y;
          }
          return p;
        };

        this.addMarker = function (p, from, priorTo) {
          // if the last angle isn't filled in because we didn't have this point yet ...
          if (priorTo != null && this.angles.length > 0 && this.angles[this.angles.length - 1] == null) {
            this.angles[this.angles.length - 1] = this.points[this.points.length - 1].angleTo(priorTo);
          }
          this.addMarkerAngle(p, from == null ? null : from.angleTo(p));
        };

        this.addMarkerAngle = function (p, a) {
          this.points.push(p);
          this.angles.push(a);
        };

        this.getMarkerPoints = function () { return this.points; };
        this.getMarkerAngles = function () {
          for (var i = 0; i < this.angles.length; i++) {
            if (this.angles[i] == null) {
              for (var j = i + 1; j < this.angles.length; j++) {
                if (this.angles[j] != null) {
                  this.angles[i] = this.angles[j];
                  break;
                }
              }
            }
          }
          return this.angles;
        };
      })(d);

      this.path = function (ctx) {
        var pp = this.PathParser;
        pp.reset();

        var bb = new svg.BoundingBox();
        if (ctx != null) ctx.beginPath();
        while (!pp.isEnd()) {
          pp.nextCommand();
          switch (pp.command) {
            case 'M':
            case 'm':
              var p = pp.getAsCurrentPoint();
              pp.addMarker(p);
              bb.addPoint(p.x, p.y);
              if (ctx != null) ctx.moveTo(p.x, p.y);
              pp.start = pp.current;
              while (!pp.isCommandOrEnd()) {
                var p = pp.getAsCurrentPoint();
                pp.addMarker(p, pp.start);
                bb.addPoint(p.x, p.y);
                if (ctx != null) ctx.lineTo(p.x, p.y);
              }
              break;
            case 'L':
            case 'l':
              while (!pp.isCommandOrEnd()) {
                var c = pp.current;
                var p = pp.getAsCurrentPoint();
                pp.addMarker(p, c);
                bb.addPoint(p.x, p.y);
                if (ctx != null) ctx.lineTo(p.x, p.y);
              }
              break;
            case 'H':
            case 'h':
              while (!pp.isCommandOrEnd()) {
                var newP = new svg.Point((pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(), pp.current.y);
                pp.addMarker(newP, pp.current);
                pp.current = newP;
                bb.addPoint(pp.current.x, pp.current.y);
                if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
              }
              break;
            case 'V':
            case 'v':
              while (!pp.isCommandOrEnd()) {
                var newP = new svg.Point(pp.current.x, (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar());
                pp.addMarker(newP, pp.current);
                pp.current = newP;
                bb.addPoint(pp.current.x, pp.current.y);
                if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
              }
              break;
            case 'C':
            case 'c':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current;
                var p1 = pp.getPoint();
                var cntrl = pp.getAsControlPoint();
                var cp = pp.getAsCurrentPoint();
                pp.addMarker(cp, cntrl, p1);
                bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
                if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
              }
              break;
            case 'S':
            case 's':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current;
                var p1 = pp.getReflectedControlPoint();
                var cntrl = pp.getAsControlPoint();
                var cp = pp.getAsCurrentPoint();
                pp.addMarker(cp, cntrl, p1);
                bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
                if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
              }
              break;
            case 'Q':
            case 'q':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current;
                var cntrl = pp.getAsControlPoint();
                var cp = pp.getAsCurrentPoint();
                pp.addMarker(cp, cntrl, cntrl);
                bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
                if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
              }
              break;
            case 'T':
            case 't':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current;
                var cntrl = pp.getReflectedControlPoint();
                pp.control = cntrl;
                var cp = pp.getAsCurrentPoint();
                pp.addMarker(cp, cntrl, cntrl);
                bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
                if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
              }
              break;
            case 'A':
            case 'a':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current;
                var rx = pp.getScalar();
                var ry = pp.getScalar();
                var xAxisRotation = pp.getScalar() * (Math.PI / 180.0);
                var largeArcFlag = pp.getScalar();
                var sweepFlag = pp.getScalar();
                var cp = pp.getAsCurrentPoint();

                // Conversion from endpoint to center parameterization
                // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
                // x1', y1'
                var currp = new svg.Point(
                  Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0, -Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0
                );
                // adjust radii
                var l = Math.pow(currp.x, 2) / Math.pow(rx, 2) + Math.pow(currp.y, 2) / Math.pow(ry, 2);
                if (l > 1) {
                  rx *= Math.sqrt(l);
                  ry *= Math.sqrt(l);
                }
                // cx', cy'
                var s = (largeArcFlag == sweepFlag ? -1 : 1) * Math.sqrt(
                  ((Math.pow(rx, 2) * Math.pow(ry, 2)) - (Math.pow(rx, 2) * Math.pow(currp.y, 2)) - (Math.pow(ry, 2) * Math.pow(currp.x, 2))) /
                  (Math.pow(rx, 2) * Math.pow(currp.y, 2) + Math.pow(ry, 2) * Math.pow(currp.x, 2))
                );
                if (isNaN(s)) s = 0;
                var cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx);
                // cx, cy
                var centp = new svg.Point(
                  (curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y,
                  (curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y
                );
                // vector magnitude
                var m = function (v) { return Math.sqrt(Math.pow(v[0], 2) + Math.pow(v[1], 2)); };
                // ratio between two vectors
                var r = function (u, v) { return (u[0] * v[0] + u[1] * v[1]) / (m(u) * m(v)) };
                // angle between two vectors
                var a = function (u, v) { return (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(r(u, v)); };
                // initial angle
                var a1 = a([1, 0], [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]);
                // angle delta
                var u = [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry];
                var v = [(-currp.x - cpp.x) / rx, (-currp.y - cpp.y) / ry];
                var ad = a(u, v);
                if (r(u, v) <= -1) ad = Math.PI;
                if (r(u, v) >= 1) ad = 0;

                // for markers
                var dir = 1 - sweepFlag ? 1.0 : -1.0;
                var ah = a1 + dir * (ad / 2.0);
                var halfWay = new svg.Point(
                  centp.x + rx * Math.cos(ah),
                  centp.y + ry * Math.sin(ah)
                );
                pp.addMarkerAngle(halfWay, ah - dir * Math.PI / 2);
                pp.addMarkerAngle(cp, ah - dir * Math.PI);

                bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
                if (ctx != null && !isNaN(a1) && !isNaN(ad)) {
                  var r = rx > ry ? rx : ry;
                  var sx = rx > ry ? 1 : rx / ry;
                  var sy = rx > ry ? ry / rx : 1;

                  ctx.translate(centp.x, centp.y);
                  ctx.rotate(xAxisRotation);
                  ctx.scale(sx, sy);
                  ctx.arc(0, 0, r, a1, a1 + ad, 1 - sweepFlag);
                  ctx.scale(1 / sx, 1 / sy);
                  ctx.rotate(-xAxisRotation);
                  ctx.translate(-centp.x, -centp.y);
                }
              }
              break;
            case 'Z':
            case 'z':
              if (ctx != null) {
                // only close path if it is not a straight line
                if (bb.x1 !== bb.x2 && bb.y1 !== bb.y2) {
                  ctx.closePath();
                }
              }
              pp.current = pp.start;
          }
        }

        return bb;
      };

      this.getMarkers = function () {
        var points = this.PathParser.getMarkerPoints();
        var angles = this.PathParser.getMarkerAngles();

        var markers = [];
        for (var i = 0; i < points.length; i++) {
          markers.push([points[i], angles[i]]);
        }
        return markers;
      };
    };
    svg.Element.path.prototype = new svg.Element.PathElementBase;

    // pattern element
    svg.Element.pattern = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.createPattern = function (ctx, element, parentOpacityProp) {
        var width = this.attribute('width').toPixels('x', true);
        var height = this.attribute('height').toPixels('y', true);

        // render me using a temporary svg element
        var tempSvg = new svg.Element.svg();
        tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
        tempSvg.attributes['width'] = new svg.Property('width', width + 'px');
        tempSvg.attributes['height'] = new svg.Property('height', height + 'px');
        tempSvg.attributes['transform'] = new svg.Property('transform', this.attribute('patternTransform').value);
        tempSvg.children = this.children;

        var c = createCanvas(width, height);
        var cctx = c.getContext('2d');
        if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
          cctx.translate(this.attribute('x').toPixels('x', true), this.attribute('y').toPixels('y', true));
        }

        if (parentOpacityProp.hasValue()) {
          this.styles['fill-opacity'] = parentOpacityProp;
        } else {
          delete this.styles['fill-opacity'];
        }

        // render 3x3 grid so when we transform there's no white space on edges
        for (var x = -1; x <= 1; x++) {
          for (var y = -1; y <= 1; y++) {
            cctx.save();
            tempSvg.attributes['x'] = new svg.Property('x', x * c.width);
            tempSvg.attributes['y'] = new svg.Property('y', y * c.height);
            tempSvg.render(cctx);
            cctx.restore();
          }
        }
        var pattern = ctx.createPattern(c, 'repeat');
        return pattern;
      };
    };
    svg.Element.pattern.prototype = new svg.Element.ElementBase;

    // marker element
    svg.Element.marker = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.baseRender = this.render;
      this.render = function (ctx, point, angle) {
        if (!point) { return; }
        ctx.translate(point.x, point.y);
        if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(angle);
        if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(ctx.lineWidth, ctx.lineWidth);
        ctx.save();

        // render me using a temporary svg element
        var tempSvg = new svg.Element.svg();
        tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
        tempSvg.attributes['refX'] = new svg.Property('refX', this.attribute('refX').value);
        tempSvg.attributes['refY'] = new svg.Property('refY', this.attribute('refY').value);
        tempSvg.attributes['width'] = new svg.Property('width', this.attribute('markerWidth').value);
        tempSvg.attributes['height'] = new svg.Property('height', this.attribute('markerHeight').value);
        tempSvg.attributes['fill'] = new svg.Property('fill', this.attribute('fill').valueOrDefault('black'));
        tempSvg.attributes['stroke'] = new svg.Property('stroke', this.attribute('stroke').valueOrDefault('none'));
        tempSvg.children = this.children;
        tempSvg.render(ctx);

        ctx.restore();
        if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(1 / ctx.lineWidth, 1 / ctx.lineWidth);
        if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(-angle);
        ctx.translate(-point.x, -point.y);
      };
    };
    svg.Element.marker.prototype = new svg.Element.ElementBase;

    // definitions element
    svg.Element.defs = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.render = function (/* ctx */) {
        // NOOP
      };
    };
    svg.Element.defs.prototype = new svg.Element.ElementBase;

    // base for gradients
    svg.Element.GradientBase = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.stops = [];
      for (var i = 0; i < this.children.length; i++) {
        var child = this.children[i];
        if (child.type == 'stop') this.stops.push(child);
      }

      this.getGradient = function () {
        // OVERRIDE ME!
      };

      this.gradientUnits = function () {
        return this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
      };

      this.attributesToInherit = ['gradientUnits'];

      this.inheritStopContainer = function (stopsContainer) {
        for (var i = 0; i < this.attributesToInherit.length; i++) {
          var attributeToInherit = this.attributesToInherit[i];
          if (!this.attribute(attributeToInherit).hasValue() && stopsContainer.attribute(attributeToInherit).hasValue()) {
            this.attribute(attributeToInherit, true).value = stopsContainer.attribute(attributeToInherit).value;
          }
        }
      };

      this.createGradient = function (ctx, element, parentOpacityProp) {
        var stopsContainer = this;
        if (this.getHrefAttribute().hasValue()) {
          stopsContainer = this.getHrefAttribute().getDefinition();
          this.inheritStopContainer(stopsContainer);
        }

        var addParentOpacity = function (color) {
          if (parentOpacityProp.hasValue()) {
            var p = new svg.Property('color', color);
            return p.addOpacity(parentOpacityProp).value;
          }
          return color;
        };

        var g = this.getGradient(ctx, element);
        if (g == null) return addParentOpacity(stopsContainer.stops[stopsContainer.stops.length - 1].color);
        for (var i = 0; i < stopsContainer.stops.length; i++) {
          g.addColorStop(stopsContainer.stops[i].offset, addParentOpacity(stopsContainer.stops[i].color));
        }

        if (this.attribute('gradientTransform').hasValue()) {
          // render as transformed pattern on temporary canvas
          var rootView = svg.ViewPort.viewPorts[0];

          var rect = new svg.Element.rect();
          rect.attributes['x'] = new svg.Property('x', -svg.MAX_VIRTUAL_PIXELS / 3.0);
          rect.attributes['y'] = new svg.Property('y', -svg.MAX_VIRTUAL_PIXELS / 3.0);
          rect.attributes['width'] = new svg.Property('width', svg.MAX_VIRTUAL_PIXELS);
          rect.attributes['height'] = new svg.Property('height', svg.MAX_VIRTUAL_PIXELS);

          var group = new svg.Element.g();
          group.attributes['transform'] = new svg.Property('transform', this.attribute('gradientTransform').value);
          group.children = [rect];

          var tempSvg = new svg.Element.svg();
          tempSvg.attributes['x'] = new svg.Property('x', 0);
          tempSvg.attributes['y'] = new svg.Property('y', 0);
          tempSvg.attributes['width'] = new svg.Property('width', rootView.width);
          tempSvg.attributes['height'] = new svg.Property('height', rootView.height);
          tempSvg.children = [group];
          var c = createCanvas(rootView.width, rootView.height);
          var tempCtx = c.getContext('2d');
          tempCtx.fillStyle = g;
          tempSvg.render(tempCtx);
          return tempCtx.createPattern(c, 'no-repeat');
        }

        return g;
      };
    };
    svg.Element.GradientBase.prototype = new svg.Element.ElementBase;

    // linear gradient element
    svg.Element.linearGradient = function (node) {
      this.base = svg.Element.GradientBase;
      this.base(node);

      this.attributesToInherit.push('x1');
      this.attributesToInherit.push('y1');
      this.attributesToInherit.push('x2');
      this.attributesToInherit.push('y2');

      this.getGradient = function (ctx, element) {
        var bb = this.gradientUnits() == 'objectBoundingBox' ? element.getBoundingBox(ctx) : null;

        if (!this.attribute('x1').hasValue() &&
          !this.attribute('y1').hasValue() &&
          !this.attribute('x2').hasValue() &&
          !this.attribute('y2').hasValue()) {
          this.attribute('x1', true).value = 0;
          this.attribute('y1', true).value = 0;
          this.attribute('x2', true).value = 1;
          this.attribute('y2', true).value = 0;
        }

        var x1 = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.x() + bb.width() * this.attribute('x1').numValue() :
          this.attribute('x1').toPixels('x'));
        var y1 = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.y() + bb.height() * this.attribute('y1').numValue() :
          this.attribute('y1').toPixels('y'));
        var x2 = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.x() + bb.width() * this.attribute('x2').numValue() :
          this.attribute('x2').toPixels('x'));
        var y2 = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.y() + bb.height() * this.attribute('y2').numValue() :
          this.attribute('y2').toPixels('y'));

        if (x1 == x2 && y1 == y2) return null;
        return ctx.createLinearGradient(x1, y1, x2, y2);
      };
    };
    svg.Element.linearGradient.prototype = new svg.Element.GradientBase;

    // radial gradient element
    svg.Element.radialGradient = function (node) {
      this.base = svg.Element.GradientBase;
      this.base(node);

      this.attributesToInherit.push('cx');
      this.attributesToInherit.push('cy');
      this.attributesToInherit.push('r');
      this.attributesToInherit.push('fx');
      this.attributesToInherit.push('fy');
      this.attributesToInherit.push('fr');

      this.getGradient = function (ctx, element) {
        var bb = element.getBoundingBox(ctx);

        if (!this.attribute('cx').hasValue()) this.attribute('cx', true).value = '50%';
        if (!this.attribute('cy').hasValue()) this.attribute('cy', true).value = '50%';
        if (!this.attribute('r').hasValue()) this.attribute('r', true).value = '50%';

        var cx = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.x() + bb.width() * this.attribute('cx').numValue() :
          this.attribute('cx').toPixels('x'));
        var cy = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.y() + bb.height() * this.attribute('cy').numValue() :
          this.attribute('cy').toPixels('y'));

        var fx = cx;
        var fy = cy;
        if (this.attribute('fx').hasValue()) {
          fx = (this.gradientUnits() == 'objectBoundingBox' ?
            bb.x() + bb.width() * this.attribute('fx').numValue() :
            this.attribute('fx').toPixels('x'));
        }
        if (this.attribute('fy').hasValue()) {
          fy = (this.gradientUnits() == 'objectBoundingBox' ?
            bb.y() + bb.height() * this.attribute('fy').numValue() :
            this.attribute('fy').toPixels('y'));
        }

        var r = (this.gradientUnits() == 'objectBoundingBox' ?
          (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue() :
          this.attribute('r').toPixels());

        var fr = this.attribute('fr').toPixels();
        return ctx.createRadialGradient(fx, fy, fr, cx, cy, r);
      };
    };
    svg.Element.radialGradient.prototype = new svg.Element.GradientBase;

    // gradient stop element
    svg.Element.stop = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.offset = this.attribute('offset').numValue();
      if (this.offset < 0) this.offset = 0;
      if (this.offset > 1) this.offset = 1;

      var stopColor = this.style('stop-color', true);
      if (stopColor.value === '') stopColor.value = '#000';
      if (this.style('stop-opacity').hasValue()) stopColor = stopColor.addOpacity(this.style('stop-opacity'));
      this.color = stopColor.value;
    };
    svg.Element.stop.prototype = new svg.Element.ElementBase;

    // animation base element
    svg.Element.AnimateBase = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      svg.Animations.push(this);

      this.duration = 0.0;
      this.begin = this.attribute('begin').toMilliseconds();
      this.maxDuration = this.begin + this.attribute('dur').toMilliseconds();

      this.getProperty = function () {
        var attributeType = this.attribute('attributeType').value;
        var attributeName = this.attribute('attributeName').value;

        if (attributeType == 'CSS') {
          return this.parent.style(attributeName, true);
        }
        return this.parent.attribute(attributeName, true);
      };

      this.initialValue = null;
      this.initialUnits = '';
      this.removed = false;

      this.calcValue = function () {
        // OVERRIDE ME!
        return '';
      };

      this.update = function (delta) {
        // set initial value
        if (this.initialValue == null) {
          this.initialValue = this.getProperty().value;
          this.initialUnits = this.getProperty().getUnits();
        }

        // if we're past the end time
        if (this.duration > this.maxDuration) {
          // loop for indefinitely repeating animations
          if (this.attribute('repeatCount').value == 'indefinite' ||
            this.attribute('repeatDur').value == 'indefinite') {
            this.duration = 0.0;
          } else if (this.attribute('fill').valueOrDefault('remove') == 'freeze' && !this.frozen) {
            this.frozen = true;
            this.parent.animationFrozen = true;
            this.parent.animationFrozenValue = this.getProperty().value;
          } else if (this.attribute('fill').valueOrDefault('remove') == 'remove' && !this.removed) {
            this.removed = true;
            this.getProperty().value = this.parent.animationFrozen ? this.parent.animationFrozenValue : this.initialValue;
            return true;
          }
          return false;
        }
        this.duration = this.duration + delta;

        // if we're past the begin time
        var updated = false;
        if (this.begin < this.duration) {
          var newValue = this.calcValue(); // tween

          if (this.attribute('type').hasValue()) {
            // for transform, etc.
            var type = this.attribute('type').value;
            newValue = type + '(' + newValue + ')';
          }

          this.getProperty().value = newValue;
          updated = true;
        }

        return updated;
      };

      this.from = this.attribute('from');
      this.to = this.attribute('to');
      this.values = this.attribute('values');
      if (this.values.hasValue()) this.values.value = this.values.value.split(';');

      // fraction of duration we've covered
      this.progress = function () {
        var ret = { progress: (this.duration - this.begin) / (this.maxDuration - this.begin) };
        if (this.values.hasValue()) {
          var p = ret.progress * (this.values.value.length - 1);
          var lb = Math.floor(p),
            ub = Math.ceil(p);
          ret.from = new svg.Property('from', parseFloat(this.values.value[lb]));
          ret.to = new svg.Property('to', parseFloat(this.values.value[ub]));
          ret.progress = (p - lb) / (ub - lb);
        } else {
          ret.from = this.from;
          ret.to = this.to;
        }
        return ret;
      };
    };
    svg.Element.AnimateBase.prototype = new svg.Element.ElementBase;

    // animate element
    svg.Element.animate = function (node) {
      this.base = svg.Element.AnimateBase;
      this.base(node);

      this.calcValue = function () {
        var p = this.progress();

        // tween value linearly
        var newValue = p.from.numValue() + (p.to.numValue() - p.from.numValue()) * p.progress;
        if (this.initialUnits === '%') {
          newValue *= 100.0; // numValue() returns 0-1 whereas properties are 0-100
        }
        return newValue + this.initialUnits;
      };
    };
    svg.Element.animate.prototype = new svg.Element.AnimateBase;

    // animate color element
    svg.Element.animateColor = function (node) {
      this.base = svg.Element.AnimateBase;
      this.base(node);

      this.calcValue = function () {
        var p = this.progress();
        var from = new rgbcolor(p.from.value);
        var to = new rgbcolor(p.to.value);

        if (from.ok && to.ok) {
          // tween color linearly
          var r = from.r + (to.r - from.r) * p.progress;
          var g = from.g + (to.g - from.g) * p.progress;
          var b = from.b + (to.b - from.b) * p.progress;
          return 'rgb(' + parseInt(r, 10) + ',' + parseInt(g, 10) + ',' + parseInt(b, 10) + ')';
        }
        return this.attribute('from').value;
      };
    };
    svg.Element.animateColor.prototype = new svg.Element.AnimateBase;

    // animate transform element
    svg.Element.animateTransform = function (node) {
      this.base = svg.Element.AnimateBase;
      this.base(node);

      this.calcValue = function () {
        var p = this.progress();

        // tween value linearly
        var from = svg.ToNumberArray(p.from.value);
        var to = svg.ToNumberArray(p.to.value);
        var newValue = '';
        for (var i = 0; i < from.length; i++) {
          newValue += from[i] + (to[i] - from[i]) * p.progress + ' ';
        }
        return newValue;
      };
    };
    svg.Element.animateTransform.prototype = new svg.Element.animate;

    // font element
    svg.Element.font = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.horizAdvX = this.attribute('horiz-adv-x').numValue();

      this.isRTL = false;
      this.isArabic = false;
      this.fontFace = null;
      this.missingGlyph = null;
      this.glyphs = [];
      for (var i = 0; i < this.children.length; i++) {
        var child = this.children[i];
        if (child.type == 'font-face') {
          this.fontFace = child;
          if (child.style('font-family').hasValue()) {
            svg.Definitions[child.style('font-family').value] = this;
          }
        } else if (child.type == 'missing-glyph') this.missingGlyph = child;
        else if (child.type == 'glyph') {
          if (child.arabicForm != '') {
            this.isRTL = true;
            this.isArabic = true;
            if (typeof this.glyphs[child.unicode] == 'undefined') this.glyphs[child.unicode] = [];
            this.glyphs[child.unicode][child.arabicForm] = child;
          } else {
            this.glyphs[child.unicode] = child;
          }
        }
      }

      this.render = function(/* ctx */) {
        // NO RENDER
      };
    };
    svg.Element.font.prototype = new svg.Element.ElementBase;

    // font-face element
    svg.Element.fontface = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.ascent = this.attribute('ascent').value;
      this.descent = this.attribute('descent').value;
      this.unitsPerEm = this.attribute('units-per-em').numValue();
    };
    svg.Element.fontface.prototype = new svg.Element.ElementBase;

    // missing-glyph element
    svg.Element.missingglyph = function (node) {
      this.base = svg.Element.path;
      this.base(node);

      this.horizAdvX = 0;
    };
    svg.Element.missingglyph.prototype = new svg.Element.path;

    // glyph element
    svg.Element.glyph = function (node) {
      this.base = svg.Element.path;
      this.base(node);

      this.horizAdvX = this.attribute('horiz-adv-x').numValue();
      this.unicode = this.attribute('unicode').value;
      this.arabicForm = this.attribute('arabic-form').value;
    };
    svg.Element.glyph.prototype = new svg.Element.path;

    // text element
    svg.Element.text = function (node) {
      this.captureTextNodes = true;
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.baseSetContext = this.setContext;
      this.setContext = function (ctx) {
        this.baseSetContext(ctx);

        var textBaseline = this.style('dominant-baseline').toTextBaseline();
        if (textBaseline == null) textBaseline = this.style('alignment-baseline').toTextBaseline();
        if (textBaseline != null) ctx.textBaseline = textBaseline;
      };

      this.initializeCoordinates = function (ctx) {
        this.x = this.attribute('x').toPixels('x');
        this.y = this.attribute('y').toPixels('y');
        if (this.attribute('dx').hasValue()) this.x += this.attribute('dx').toPixels('x');
        if (this.attribute('dy').hasValue()) this.y += this.attribute('dy').toPixels('y');
        this.x += this.getAnchorDelta(ctx, this, 0);
      };

      this.getBoundingBox = function (ctx) {
        this.initializeCoordinates(ctx);
        var bb = null;
        for (var i = 0; i < this.children.length; i++) {
          var childBB = this.getChildBoundingBox(ctx, this, this, i);
          if (bb == null) bb = childBB;
          else bb.addBoundingBox(childBB);
        }
        return bb;
      };

      this.renderChildren = function (ctx) {
        this.initializeCoordinates(ctx);
        for (var i = 0; i < this.children.length; i++) {
          this.renderChild(ctx, this, this, i);
        }
        svg.Mouse.checkBoundingBox(this, this.getBoundingBox(ctx));
      };

      this.getAnchorDelta = function (ctx, parent, startI) {
        var textAnchor = this.style('text-anchor').valueOrDefault('start');
        if (textAnchor != 'start') {
          var width = 0;
          for (var i = startI; i < parent.children.length; i++) {
            var child = parent.children[i];
            if (i > startI && child.attribute('x').hasValue()) break; // new group
            width += child.measureTextRecursive(ctx);
          }
          return -1 * (textAnchor == 'end' ? width : width / 2.0);
        }
        return 0;
      };

      this.adjustChildCoordinates = function(ctx, textParent, parent, i) {
        var child = parent.children[i];
        if (typeof(child.measureText) !== 'function') {
          return child;
        }

        if (child.attribute('x').hasValue()) {
          child.x = child.attribute('x').toPixels('x') + textParent.getAnchorDelta(ctx, parent, i);

          // local text-anchor
          var textAnchor = child.attribute('text-anchor').valueOrDefault('start');
          if (textAnchor !== 'start') {
            var width = child.measureTextRecursive(ctx);
            child.x += -1 * (textAnchor == 'end' ? width : width / 2.0);
          }

          if (child.attribute('dx').hasValue()) child.x += child.attribute('dx').toPixels('x');
        } else {
          if (child.attribute('dx').hasValue()) textParent.x += child.attribute('dx').toPixels('x');
          child.x = textParent.x;
        }
        textParent.x = child.x + child.measureText(ctx);

        if (child.attribute('y').hasValue()) {
          child.y = child.attribute('y').toPixels('y');
          if (child.attribute('dy').hasValue()) child.y += child.attribute('dy').toPixels('y');
        } else {
          if (child.attribute('dy').hasValue()) textParent.y += child.attribute('dy').toPixels('y');
          child.y = textParent.y;
        }
        textParent.y = child.y;

        return child;
      };

      this.getChildBoundingBox = function (ctx, textParent, parent, i) {
        var child = this.adjustChildCoordinates(ctx, textParent, parent, i);
        var bb = child.getBoundingBox(ctx);

        for (var i = 0; i < child.children.length; i++) {
          var childBB = textParent.getChildBoundingBox(ctx, textParent, child, i);
          bb.addBoundingBox(childBB);
        }

        return bb;
      };

      this.renderChild = function (ctx, textParent, parent, i) {
        var child = this.adjustChildCoordinates(ctx, textParent, parent, i);
        child.render(ctx);

        for (var i = 0; i < child.children.length; i++) {
          textParent.renderChild(ctx, textParent, child, i);
        }
      };
    };
    svg.Element.text.prototype = new svg.Element.RenderedElementBase;

    // text base
    svg.Element.TextElementBase = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.getGlyph = function (font, text, i) {
        var c = text[i];
        var glyph = null;
        if (font.isArabic) {
          var arabicForm = 'isolated';
          if ((i == 0 || text[i - 1] == ' ') && i < text.length - 2 && text[i + 1] != ' ') arabicForm = 'terminal';
          if (i > 0 && text[i - 1] != ' ' && i < text.length - 2 && text[i + 1] != ' ') arabicForm = 'medial';
          if (i > 0 && text[i - 1] != ' ' && (i == text.length - 1 || text[i + 1] == ' ')) arabicForm = 'initial';
          if (typeof font.glyphs[c] != 'undefined') {
            glyph = font.glyphs[c][arabicForm];
            if (glyph == null && font.glyphs[c].type == 'glyph') glyph = font.glyphs[c];
          }
        } else {
          glyph = font.glyphs[c];
        }
        if (glyph == null) glyph = font.missingGlyph;
        return glyph;
      };

      this.renderChildren = function (ctx) {
        var customFont = this.parent.style('font-family').getDefinition();
        if (customFont != null) {
          var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
          var fontStyle = this.parent.style('font-style').valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle);
          var text = this.getText();
          if (customFont.isRTL) text = text.split('').reverse().join('');

          var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
          for (var i = 0; i < text.length; i++) {
            var glyph = this.getGlyph(customFont, text, i);
            var scale = fontSize / customFont.fontFace.unitsPerEm;
            ctx.translate(this.x, this.y);
            ctx.scale(scale, -scale);
            var lw = ctx.lineWidth;
            ctx.lineWidth = ctx.lineWidth * customFont.fontFace.unitsPerEm / fontSize;
            if (fontStyle == 'italic') ctx.transform(1, 0, .4, 1, 0, 0);
            glyph.render(ctx);
            if (fontStyle == 'italic') ctx.transform(1, 0, -.4, 1, 0, 0);
            ctx.lineWidth = lw;
            ctx.scale(1 / scale, -1 / scale);
            ctx.translate(-this.x, -this.y);

            this.x += fontSize * (glyph.horizAdvX || customFont.horizAdvX) / customFont.fontFace.unitsPerEm;
            if (typeof dx[i] != 'undefined' && !isNaN(dx[i])) {
              this.x += dx[i];
            }
          }
          return;
        }
        if (ctx.paintOrder == 'stroke') {
          if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
          if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
        } else {
          if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
          if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
        }
      };

      this.getText = function () {
        // OVERRIDE ME
      };

      this.measureTextRecursive = function (ctx) {
        var width = this.measureText(ctx);
        for (var i = 0; i < this.children.length; i++) {
          width += this.children[i].measureTextRecursive(ctx);
        }
        return width;
      };

      this.measureText = function (ctx) {
        var customFont = this.parent.style('font-family').getDefinition();
        if (customFont != null) {
          var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
          var measure = 0;
          var text = this.getText();
          if (customFont.isRTL) text = text.split('').reverse().join('');
          var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
          for (var i = 0; i < text.length; i++) {
            var glyph = this.getGlyph(customFont, text, i);
            measure += (glyph.horizAdvX || customFont.horizAdvX) * fontSize / customFont.fontFace.unitsPerEm;
            if (typeof dx[i] != 'undefined' && !isNaN(dx[i])) {
              measure += dx[i];
            }
          }
          return measure;
        }

        var textToMeasure = svg.compressSpaces(this.getText());
        if (!ctx.measureText) return textToMeasure.length * 10;

        ctx.save();
        this.setContext(ctx, true);
        var width = ctx.measureText(textToMeasure).width;
        ctx.restore();
        return width;
      };

      this.getBoundingBox = function (ctx) {
        var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
        return new svg.BoundingBox(this.x, this.y - fontSize, this.x + this.measureText(ctx), this.y);
      };
    };
    svg.Element.TextElementBase.prototype = new svg.Element.RenderedElementBase;

    // tspan
    svg.Element.tspan = function (node) {
      this.captureTextNodes = true;
      this.base = svg.Element.TextElementBase;
      this.base(node);

      this.text = svg.compressSpaces(node.value || node.text || node.textContent || '');
      this.getText = function () {
        // if this node has children, then they own the text
        if (this.children.length > 0) { return ''; }
        return this.text;
      };
    };
    svg.Element.tspan.prototype = new svg.Element.TextElementBase;

    // tref
    svg.Element.tref = function (node) {
      this.base = svg.Element.TextElementBase;
      this.base(node);

      this.getText = function () {
        var element = this.getHrefAttribute().getDefinition();
        if (element != null) return element.children[0].getText();
      };
    };
    svg.Element.tref.prototype = new svg.Element.TextElementBase;

    // a element
    svg.Element.a = function (node) {
      this.base = svg.Element.TextElementBase;
      this.base(node);

      this.hasText = node.childNodes.length > 0;
      for (var i = 0; i < node.childNodes.length; i++) {
        if (node.childNodes[i].nodeType != 3) this.hasText = false;
      }

      // this might contain text
      this.text = this.hasText ? node.childNodes[0].value || node.childNodes[0].data : '';
      this.getText = function () {
        return this.text;
      };

      this.baseRenderChildren = this.renderChildren;
      this.renderChildren = function (ctx) {
        if (this.hasText) {
          // render as text element
          this.baseRenderChildren(ctx);
          var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
          svg.Mouse.checkBoundingBox(this, new svg.BoundingBox(this.x, this.y - fontSize.toPixels('y'), this.x + this.measureText(ctx), this.y));
        } else if (this.children.length > 0) {
          // render as temporary group
          var g = new svg.Element.g();
          g.children = this.children;
          g.parent = this;
          g.render(ctx);
        }
      };

      this.onclick = function () {
        windowEnv.open(this.getHrefAttribute().value);
      };

      this.onmousemove = function () {
        svg.ctx.canvas.style.cursor = 'pointer';
      };
    };
    svg.Element.a.prototype = new svg.Element.TextElementBase;

    // textPath
    svg.Element.textPath = function (node) {
      this.base = svg.Element.TextElementBase;
      this.base(node);

      var pathElement = this.getHrefAttribute().getDefinition();

      this.text = svg.compressSpaces(node.value || node.text || node.textContent || '');

      this.renderChildren = function (ctx) {
        this.setTextData(ctx);

        ctx.save();
        var textDecoration = this.parent.style('text-decoration').value;
        var fontSize = this.fontSize();
        var glyphInfo = this.glyphInfo;
        var fill = ctx.fillStyle;
        if (textDecoration === 'underline') {
          ctx.beginPath();
        }
        for (var i = 0; i < glyphInfo.length; i++) {
          var p0 = glyphInfo[i].p0;
          var p1 = glyphInfo[i].p1;
          var partialText = glyphInfo[i].text;

          ctx.save();
          ctx.translate(p0.x, p0.y);
          ctx.rotate(glyphInfo[i].rotation);
          if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(partialText), 0, 0);
          if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(partialText), 0, 0);
          ctx.restore();
          if (textDecoration === 'underline') {
            if (i === 0) {
              ctx.moveTo(p0.x, p0.y + fontSize / 8);
            }
            ctx.lineTo(p1.x, p1.y + fontSize / 5);
          }

          //// To assist with debugging visually, uncomment following
          //
          // ctx.beginPath();
          // if (i % 2)
          //   ctx.strokeStyle = 'red';
          // else
          //   ctx.strokeStyle = 'green';
          // ctx.moveTo(p0.x, p0.y);
          // ctx.lineTo(p1.x, p1.y);
          // ctx.stroke();
          // ctx.closePath();
        }

        if (textDecoration === 'underline') {
          ctx.lineWidth = fontSize / 20;
          ctx.strokeStyle = fill;
          ctx.stroke();
          ctx.closePath();
        }
        ctx.restore();
      };

      this.path = function (ctx) {
        var ca = this.dataArray;
        if (ctx != null) {
          ctx.beginPath();
        }
        for (var n = 0; n < ca.length; n++) {
          var c = ca[n].command;
          var p = ca[n].points;
          switch (c) {
            case 'L':
              if (ctx != null) ctx.lineTo(p[0], p[1]);
              break;
            case 'M':
              if (ctx != null) ctx.moveTo(p[0], p[1]);
              break;
            case 'C':
              if (ctx != null) ctx.bezierCurveTo(p[0], p[1], p[2], p[3], p[4], p[5]);
              break;
            case 'Q':
              if (ctx != null) ctx.quadraticCurveTo(p[0], p[1], p[2], p[3]);
              break;
            case 'A':
              var cx = p[0], cy = p[1], rx = p[2], ry = p[3],
                theta = p[4], dTheta = p[5], psi = p[6], fs = p[7];

              var r = (rx > ry) ? rx : ry;
              var scaleX = (rx > ry) ? 1 : rx / ry;
              var scaleY = (rx > ry) ? ry / rx : 1;

              if (ctx != null) {
                ctx.translate(cx, cy);
                ctx.rotate(psi);
                ctx.scale(scaleX, scaleY);
                ctx.arc(0, 0, r, theta, theta + dTheta, 1 - fs);
                ctx.scale(1 / scaleX, 1 / scaleY);
                ctx.rotate(-psi);
                ctx.translate(-cx, -cy);
              }
              break;
            case 'z':
              if (ctx != null) ctx.closePath();
              break;
          }
        }
      };

      this.getText = function () {
        return this.text;
      };

      this.fontSize = function () {
        return this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
      };

      this.measureText = function (ctx, text) {
        var customFont = this.parent.style('font-family').getDefinition();
        text = text || this.getText();
        if (customFont != null) {
          var fontSize = this.fontSize();
          var measure = 0;
          if (customFont.isRTL) text = text.split("").reverse().join("");
          var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
          for (var i = 0; i < text.length; i++) {
            var glyph = this.getGlyph(customFont, text, i);
            measure += (glyph.horizAdvX || customFont.horizAdvX) * fontSize / customFont.fontFace.unitsPerEm;
            if (typeof dx[i] != 'undefined' && !isNaN(dx[i])) {
              measure += dx[i];
            }
          }
          return measure;
        }

        var textToMeasure = svg.compressSpaces(text);
        if (!ctx.measureText) return textToMeasure.length * 10;

        ctx.save();
        this.setContext(ctx);
        var width = ctx.measureText(textToMeasure).width;
        ctx.restore();
        return width;
      };

      // This method supposes what all custom fonts already loaded.
      // If some font will be loaded after this method call, <textPath> will not be rendered correctly.
      // You need to call this method manually to update glyphs cache.
      this.setTextData = function (ctx) {
        if (this.hasOwnProperty('glyphInfo')) return;

        var that = this;
        var charArr = this.getText().split('');
        var spacesNumber = this.getText().split(' ').length - 1;
        var dx = svg.ToNumberArray(this.parent.attribute('dx').valueOrDefault('0'));
        var letterSpacing = 0;
        var anchor = this.parent.style('text-anchor').valueOrDefault('start');

        var thisSpacing = this.style('letter-spacing');
        var parentSpacing = this.parent.style('letter-spacing');
        if (!thisSpacing.hasValue() || thisSpacing.getValue() === 'inherit') {
          letterSpacing = parentSpacing.toPixels();
        } else if (thisSpacing.hasValue()) {
          if (thisSpacing.getValue() !== 'initial' && thisSpacing.getValue() !== 'unset') {
            letterSpacing = thisSpacing.toPixels();
          }
        }

        // fill letter-spacing cache
        this.letterSpacingCache = [];
        for (var i = 0; i < this.getText().length; i++) {
          this.letterSpacingCache.push(dx[i] !== undefined ? dx[i] : letterSpacing);
        }

        var dxSum = this.letterSpacingCache.reduce(function (acc, cur) { return acc + cur || 0 }, 0);

        this.textWidth = this.measureText(ctx);
        this.textHeight = this.fontSize();

        var textFullWidth = Math.max(this.textWidth + dxSum, 0);

        this.glyphInfo = [];

        var fullPathWidth = this.getPathLength();

        var startOffset = this.style('startOffset').numValueOrDefault(0) * fullPathWidth;
        var offset = 0;
        if (anchor === 'middle' || anchor === 'center') {
          offset = -textFullWidth / 2;
        }
        if (anchor === 'end' || anchor === 'right') {
          offset = -textFullWidth;
        }
        offset += startOffset;

        var getGetterSpacingAt = function (idx) {
          idx = idx || 0;
          return that.letterSpacingCache[idx] || 0;
        };

        var findSegmentToFitChar = function (c, charI) {
          var glyphWidth = that.measureText(ctx, c);

          if (c === ' ' && anchor === 'justify' && textFullWidth < fullPathWidth) {
            glyphWidth += (fullPathWidth - textFullWidth) / spacesNumber;
          }

          if (charI > -1) {
            offset += getGetterSpacingAt(charI);
          }

          var splineStep = that.textHeight / 20;
          var segment = {
            p0: that.getEquidistantPointOnPath(offset, splineStep),
            p1: that.getEquidistantPointOnPath(offset + glyphWidth, splineStep)
          };

          offset += glyphWidth;

          return segment;
        };

        for (var i = 0; i < charArr.length; i++) {

          // Find such segment what distance between p0 and p1 is approx. width of glyph
          var segment = findSegmentToFitChar(charArr[i], i);

          if (segment.p0 === undefined || segment.p1 === undefined) {
            continue;
          }

          var width = that.getLineLength(segment.p0.x, segment.p0.y, segment.p1.x, segment.p1.y);

          // Note: Since glyphs are rendered one at a time, any kerning pair data built into the font will not be used.
          // Can foresee having a rough pair table built in that the developer can override as needed.
          // Or use "dx" attribute of the <text> node as a naive replacement

          var kern = 0;
          // placeholder for future implementation

          var midpoint = that.getPointOnLine(kern + width / 2.0, segment.p0.x, segment.p0.y, segment.p1.x, segment.p1.y);

          var rotation = Math.atan2((segment.p1.y - segment.p0.y), (segment.p1.x - segment.p0.x));
          this.glyphInfo.push({
            transposeX: midpoint.x,
            transposeY: midpoint.y,
            text: charArr[i],
            rotation: rotation,
            p0: segment.p0,
            p1: segment.p1
          });
        }
      };

      this.parsePathData = function (path) {
        this.pathLength = undefined; // reset path length

        if (!path) {
          return [];
        }

        var ca = [];
        var pp = path.PathParser;
        pp.reset();

        // convert l, H, h, V, and v to L
        while (!pp.isEnd()) {
          var points = [];
          var cmd = null;
          var startX = pp.current ? pp.current.x : 0;
          var startY = pp.current ? pp.current.y : 0;

          pp.nextCommand();
          var C = pp.command.toUpperCase();
          switch (pp.command) {
            case 'M':
            case 'm':
              var p = pp.getAsCurrentPoint();
              // pp.addMarker(p);
              points.push(p.x, p.y);

              pp.start = pp.current;
              while (!pp.isCommandOrEnd()) {
                var p = pp.getAsCurrentPoint();
                points.push(p.x, p.y);
                cmd = 'L';
              }
              break;
            case 'L':
            case 'l':
              while (!pp.isCommandOrEnd()) {
                var p = pp.getAsCurrentPoint();
                points.push(p.x, p.y);
              }
              cmd = 'L';
              break;
            case 'H':
            case 'h':
              while (!pp.isCommandOrEnd()) {
                var newP = new svg.Point((pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(),
                  pp.current.y);
                points.push(newP.x, newP.y);
                pp.current = newP;
              }
              cmd = 'L';
              break;
            case 'V':
            case 'v':
              while (!pp.isCommandOrEnd()) {
                var newP = new svg.Point(pp.current.x,
                  (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar());
                points.push(newP.x, newP.y);
                pp.current = newP;
              }
              cmd = 'L';
              break;
            case 'C':
            case 'c':
              while (!pp.isCommandOrEnd()) {
                var p1 = pp.getPoint();
                var cntrl = pp.getAsControlPoint();
                var cp = pp.getAsCurrentPoint();
                points.push(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
              }
              break;
            case 'S':
            case 's':
              while (!pp.isCommandOrEnd()) {
                var p1 = pp.getReflectedControlPoint();
                var cntrl = pp.getAsControlPoint();
                var cp = pp.getAsCurrentPoint();
                points.push(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
              }
              cmd = 'C';
              break;
            case 'Q':
            case 'q':
              while (!pp.isCommandOrEnd()) {
                var cntrl = pp.getAsControlPoint();
                var cp = pp.getAsCurrentPoint();
                points.push(cntrl.x, cntrl.y, cp.x, cp.y);
              }
              break;
            case 'T':
            case 't':
              while (!pp.isCommandOrEnd()) {
                var cntrl = pp.getReflectedControlPoint();
                pp.control = cntrl;
                var cp = pp.getAsCurrentPoint();
                points.push(cntrl.x, cntrl.y, cp.x, cp.y);
              }
              cmd = 'Q';
              break;
            case 'A':
            case 'a':
              while (!pp.isCommandOrEnd()) {
                var curr = pp.current; // x1, y1
                var rx = pp.getScalar();
                var ry = pp.getScalar();
                var xAxisRotation = pp.getScalar() * (Math.PI / 180.0); // φ
                var largeArcFlag = pp.getScalar(); //  fA
                var sweepFlag = pp.getScalar(); //  fS
                var cp = pp.getAsCurrentPoint(); // x2, y2

                // Conversion from endpoint to center parameterization
                // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
                // x1', y1'
                var currp = new svg.Point(
                  Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0,
                  -Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0
                );
                // adjust radii
                var l = Math.pow(currp.x, 2) / Math.pow(rx, 2) + Math.pow(currp.y, 2) / Math.pow(ry, 2);
                if (l > 1) {
                  rx *= Math.sqrt(l);
                  ry *= Math.sqrt(l);
                }
                // cx', cy'
                var s = (largeArcFlag == sweepFlag ? -1 : 1) * Math.sqrt(
                  ((Math.pow(rx, 2) * Math.pow(ry, 2)) - (Math.pow(rx, 2) * Math.pow(currp.y, 2)) - (Math.pow(ry, 2) * Math.pow(currp.x, 2))) /
                  (Math.pow(rx, 2) * Math.pow(currp.y, 2) + Math.pow(ry, 2) * Math.pow(currp.x, 2))
                );
                if (isNaN(s)) s = 0;
                var cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx);
                // cx, cy
                var centp = new svg.Point(
                  (curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y,
                  (curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y
                );
                // vector magnitude
                var m = function (v) {
                  return Math.sqrt(Math.pow(v[0], 2) + Math.pow(v[1], 2));
                };
                // ratio between two vectors
                var r = function (u, v) {
                  return (u[0] * v[0] + u[1] * v[1]) / (m(u) * m(v))
                };
                // angle between two vectors
                var a = function (u, v) {
                  return (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(r(u, v));
                };
                // initial angle
                var a1 = a([1, 0], [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]); // θ1
                // angle delta
                var u = [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry];
                var v = [(-currp.x - cpp.x) / rx, (-currp.y - cpp.y) / ry];
                var ad = a(u, v); // Δθ
                if (r(u, v) <= -1) ad = Math.PI;
                if (r(u, v) >= 1) ad = 0;
                if (sweepFlag === 0 && ad > 0) ad = ad - 2 * Math.PI;
                if (sweepFlag === 1 && ad < 0) ad = ad + 2 * Math.PI;

                points = [centp.x, centp.y, rx, ry, a1, ad, xAxisRotation, sweepFlag];
              }
              break;
            case 'Z':
            case 'z':
              pp.current = pp.start;
          }

          if (C !== 'Z') {
            ca.push({
              command: cmd || C,
              points: points,
              start: {
                x: startX,
                y: startY
              },
              pathLength: this.calcLength(startX, startY, cmd || C, points)
            });
          } else {
            ca.push({
              command: 'z',
              points: [],
              start: undefined,
              pathLength: 0
            });
          }
        }
        return ca;
      };

      this.getPathLength = function() {
        if (this.pathLength === undefined || this.pathLength === null || isNaN(this.pathLength)) {
          this.pathLength = 0;
          for (var l = 0; l < this.dataArray.length; l++) {
            if (this.dataArray[l].pathLength > 0) {
              this.pathLength += this.dataArray[l].pathLength;
            }
          }
        }
        return this.pathLength;
      };

      this.getPointOnPath = function(distance) {
        var cumulativePathLength = 0;
        var fullLen = this.getPathLength();
        var p = undefined;

        if (distance < -0.00005 || distance - 0.00005 > fullLen) return undefined;

        for(var i = 0; i < this.dataArray.length; i++) {
          var pathCmd = this.dataArray[i];

          if (pathCmd
            && (
              pathCmd.pathLength < 0.00005
              || cumulativePathLength + pathCmd.pathLength + 0.00005 < distance
            )
          ) {
            cumulativePathLength += pathCmd.pathLength;
            continue;
          }

          var delta = distance - cumulativePathLength;
          var currentT = undefined;
          switch (pathCmd.command) {
            case 'L':
              p = this.getPointOnLine(delta, pathCmd.start.x, pathCmd.start.y, pathCmd.points[0], pathCmd.points[1], pathCmd.start.x, pathCmd.start.y);
              break;
            case 'A':
              var start = pathCmd.points[4];
              // 4 = theta
              var dTheta = pathCmd.points[5];
              // 5 = dTheta
              var end = pathCmd.points[4] + dTheta;

              currentT = start + delta / pathCmd.pathLength * dTheta;
              if(dTheta < 0 && currentT < end || dTheta >= 0 && currentT > end) {
                break;
              }
              p = this.getPointOnEllipticalArc(pathCmd.points[0], pathCmd.points[1], pathCmd.points[2], pathCmd.points[3], currentT, pathCmd.points[6]);
              break;
            case 'C':
              currentT = delta / pathCmd.pathLength;
              if (currentT > 1) {
                currentT = 1;
              }
              p = this.getPointOnCubicBezier(currentT, pathCmd.start.x, pathCmd.start.y, pathCmd.points[0], pathCmd.points[1], pathCmd.points[2], pathCmd.points[3], pathCmd.points[4], pathCmd.points[5]);
              break;
            case 'Q':
              currentT = delta / pathCmd.pathLength;
              if (currentT > 1) {
                currentT = 1;
              }
              p = this.getPointOnQuadraticBezier(currentT, pathCmd.start.x, pathCmd.start.y, pathCmd.points[0], pathCmd.points[1], pathCmd.points[2], pathCmd.points[3]);
              break;
          }

          if (p !== undefined && p !== {}) {
            return p;
          }

          break;
        }
      };

      // TODO need some optimisations. possibly build cache only for curved segments?
      this.buildEquidistantCache = function(step, precision) {
        var fullLen = this.getPathLength();
        precision = precision || 0.25; // accuracy vs performance
        step = step || fullLen / 100;
        this.equidistantCache = this.equidistantCache || {};
        if (
          !this.equidistantCache.hasOwnProperty('points')
          || this.equidistantCache.step != step
          || this.equidistantCache.precision != precision
        ) {
          // Prepare cache
          this.equidistantCache = {
            step: step,
            precision: precision,
            points: []
          };
          // Calculate points
          var s = 0;
          for (var l = 0; l <= fullLen; l += precision) {
            var p0 = this.getPointOnPath(l),
              p1 = this.getPointOnPath(l + precision);

            if (p0 === undefined || p1 === undefined) continue;

            s += this.getLineLength(p0.x, p0.y, p1.x, p1.y);
            if (s >= step) {
              this.equidistantCache.points.push({
                x: p0.x,
                y: p0.y,
                distance: l
              });
              s -= step;
            }
          }
        }
      };

      this.getEquidistantPointOnPath = function (targetDistance, step, precision) {
        this.buildEquidistantCache(step, precision);

        if (targetDistance < 0 || targetDistance - this.getPathLength() > 0.00005) return undefined;

        var idx = Math.round(targetDistance / this.getPathLength() * (this.equidistantCache.points.length - 1));
        return this.equidistantCache.points[idx] || undefined;
      };

      this.getLineLength = function (x1, y1, x2, y2) {
        return Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
      };

      this.getPointOnLine = function (dist, P1x, P1y, P2x, P2y, fromX, fromY) {
        if (fromX === undefined) {
          fromX = P1x;
        }
        if (fromY === undefined) {
          fromY = P1y;
        }

        var m = (P2y - P1y) / ((P2x - P1x) + 0.00000001);
        var run = Math.sqrt(dist * dist / (1 + m * m));
        if (P2x < P1x) {
          run *= -1;
        }
        var rise = m * run;
        var pt;

        if (P2x === P1x) { // vertical line
          pt = {
            x: fromX,
            y: fromY + rise
          };
        } else if ((fromY - P1y) / ((fromX - P1x) + 0.00000001) === m) {
          pt = {
            x: fromX + run,
            y: fromY + rise
          };
        }
        else {
          var ix, iy;

          var len = this.getLineLength(P1x, P1y, P2x, P2y);
          if (len < 0.00000001) {
            return undefined;
          }
          var u = (((fromX - P1x) * (P2x - P1x)) + ((fromY - P1y) * (P2y - P1y)));
          u = u / (len * len);
          ix = P1x + u * (P2x - P1x);
          iy = P1y + u * (P2y - P1y);

          var pRise = this.getLineLength(fromX, fromY, ix, iy);
          var pRun = Math.sqrt(dist * dist - pRise * pRise);
          run = Math.sqrt(pRun * pRun / (1 + m * m));
          if (P2x < P1x) {
            run *= -1;
          }
          rise = m * run;
          pt = {
            x: ix + run,
            y: iy + rise
          };
        }

        return pt;
      };

      this.getPointOnCubicBezier = function (pct, P1x, P1y, P2x, P2y, P3x, P3y, P4x, P4y) {
        function CB1(t) {
          return t * t * t;
        }

        function CB2(t) {
          return 3 * t * t * (1 - t);
        }

        function CB3(t) {
          return 3 * t * (1 - t) * (1 - t);
        }

        function CB4(t) {
          return (1 - t) * (1 - t) * (1 - t);
        }

        var x = P4x * CB1(pct) + P3x * CB2(pct) + P2x * CB3(pct) + P1x * CB4(pct);
        var y = P4y * CB1(pct) + P3y * CB2(pct) + P2y * CB3(pct) + P1y * CB4(pct);

        return {
          x: x,
          y: y
        };
      };

      this.getPointOnQuadraticBezier = function (pct, P1x, P1y, P2x, P2y, P3x, P3y) {
        function QB1(t) {
          return t * t;
        }

        function QB2(t) {
          return 2 * t * (1 - t);
        }

        function QB3(t) {
          return (1 - t) * (1 - t);
        }

        var x = P3x * QB1(pct) + P2x * QB2(pct) + P1x * QB3(pct);
        var y = P3y * QB1(pct) + P2y * QB2(pct) + P1y * QB3(pct);

        return {
          x: x,
          y: y
        };
      };

      this.getPointOnEllipticalArc = function (cx, cy, rx, ry, theta, psi) {
        var cosPsi = Math.cos(psi), sinPsi = Math.sin(psi);
        var pt = {
          x: rx * Math.cos(theta),
          y: ry * Math.sin(theta)
        };
        return {
          x: cx + (pt.x * cosPsi - pt.y * sinPsi),
          y: cy + (pt.x * sinPsi + pt.y * cosPsi)
        };
      };

      this.calcLength = function (x, y, cmd, points) {
        var len, p1, p2, t;

        switch (cmd) {
          case 'L':
            return this.getLineLength(x, y, points[0], points[1]);
          case 'C':
            // Approximates by breaking curve into 100 line segments
            len = 0.0;
            p1 = this.getPointOnCubicBezier(0, x, y, points[0], points[1], points[2], points[3], points[4], points[5]);
            for (t = 0.01; t <= 1; t += 0.01) {
              p2 = this.getPointOnCubicBezier(t, x, y, points[0], points[1], points[2], points[3], points[4], points[5]);
              len += this.getLineLength(p1.x, p1.y, p2.x, p2.y);
              p1 = p2;
            }
            return len;
          case 'Q':
            // Approximates by breaking curve into 100 line segments
            len = 0.0;
            p1 = this.getPointOnQuadraticBezier(0, x, y, points[0], points[1], points[2], points[3]);
            for (t = 0.01; t <= 1; t += 0.01) {
              p2 = this.getPointOnQuadraticBezier(t, x, y, points[0], points[1], points[2], points[3]);
              len += this.getLineLength(p1.x, p1.y, p2.x, p2.y);
              p1 = p2;
            }
            return len;
          case 'A':
            // Approximates by breaking curve into line segments
            len = 0.0;
            var start = points[4];
            // 4 = theta
            var dTheta = points[5];
            // 5 = dTheta
            var end = points[4] + dTheta;
            var inc = Math.PI / 180.0;
            // 1 degree resolution
            if (Math.abs(start - end) < inc) {
              inc = Math.abs(start - end);
            }
            // Note: for purpose of calculating arc length, not going to worry about rotating X-axis by angle psi
            p1 = this.getPointOnEllipticalArc(points[0], points[1], points[2], points[3], start, 0);
            if (dTheta < 0) {// clockwise
              for (t = start - inc; t > end; t -= inc) {
                p2 = this.getPointOnEllipticalArc(points[0], points[1], points[2], points[3], t, 0);
                len += this.getLineLength(p1.x, p1.y, p2.x, p2.y);
                p1 = p2;
              }
            }
            else {// counter-clockwise
              for (t = start + inc; t < end; t += inc) {
                p2 = this.getPointOnEllipticalArc(points[0], points[1], points[2], points[3], t, 0);
                len += this.getLineLength(p1.x, p1.y, p2.x, p2.y);
                p1 = p2;
              }
            }
            p2 = this.getPointOnEllipticalArc(points[0], points[1], points[2], points[3], end, 0);
            len += this.getLineLength(p1.x, p1.y, p2.x, p2.y);

            return len;
        }

        return 0;
      };

      this.dataArray = this.parsePathData(pathElement);
    };
    svg.Element.textPath.prototype = new svg.Element.TextElementBase;

    // image element
    svg.Element.image = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      var href = this.getHrefAttribute().value;
      if (href == '') { return; }
      var isSvg = href.match(/\.svg$/);

      svg.Images.push(this);
      this.loaded = false;
      if (!isSvg) {
        this.img = doc.createElement('img');
        if (svg.opts['useCORS'] == true) { this.img.crossOrigin = 'Anonymous'; }
        var self = this;
        this.img.onload = function () { self.loaded = true; };
        this.img.onerror = function () {
          svg.log('ERROR: image "' + href + '" not found');
          self.loaded = true;
        };
        this.img.src = href;
      } else {
        this.img = svg.ajax(href);
        this.loaded = true;
      }

      this.renderChildren = function (ctx) {
        var x = this.attribute('x').toPixels('x');
        var y = this.attribute('y').toPixels('y');

        var width = this.attribute('width').toPixels('x');
        var height = this.attribute('height').toPixels('y');
        if (width == 0 || height == 0) return;

        ctx.save();
        if (isSvg) {
          ctx.drawSvg(this.img, x, y, width, height);
        } else {
          ctx.translate(x, y);
          svg.AspectRatio(ctx,
            this.attribute('preserveAspectRatio').value,
            width,
            this.img.width,
            height,
            this.img.height,
            0,
            0);
          if (self.loaded) {
            if (this.img.complete === undefined || this.img.complete) {
              ctx.drawImage(this.img, 0, 0);
            }
          }
        }
        ctx.restore();
      };

      this.getBoundingBox = function () {
        var x = this.attribute('x').toPixels('x');
        var y = this.attribute('y').toPixels('y');
        var width = this.attribute('width').toPixels('x');
        var height = this.attribute('height').toPixels('y');
        return new svg.BoundingBox(x, y, x + width, y + height);
      };
    };
    svg.Element.image.prototype = new svg.Element.RenderedElementBase;

    // group element
    svg.Element.g = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.getBoundingBox = function (ctx) {
        var bb = new svg.BoundingBox();
        for (var i = 0; i < this.children.length; i++) {
          bb.addBoundingBox(this.children[i].getBoundingBox(ctx));
        }
        return bb;
      };
    };
    svg.Element.g.prototype = new svg.Element.RenderedElementBase;

    // symbol element
    svg.Element.symbol = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.render = function (/* ctx */) {
        // NO RENDER
      };
    };
    svg.Element.symbol.prototype = new svg.Element.RenderedElementBase;

    svg.ParseExternalUrl = function(url) {
      //                                 single quotes [2]
      //                                 v           double quotes [3]
      //                                 v           v        no quotes [4]
      //                                 v           v        v
      var urlMatch = url.match(/url\(('([^']+)'|"([^"]+)"|([^'"\)]+))\)/) || [];
      return urlMatch[2] || urlMatch[3] || urlMatch[4];
    };

    // style element
    svg.Element.style = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      // text, or spaces then CDATA
      var css = '';
      for (var i = 0; i < node.childNodes.length; i++) {
        css += node.childNodes[i].data;
      }
      css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(^[\s]*\/\/.*)/gm, ''); // remove comments
      css = svg.compressSpaces(css); // replace whitespace
      var cssDefs = css.split('}');
      for (var i = 0; i < cssDefs.length; i++) {
        if (svg.trim(cssDefs[i]) != '') {
          var cssDef = cssDefs[i].split('{');
          var cssClasses = cssDef[0].split(',');
          var cssProps = cssDef[1].split(';');
          for (var j = 0; j < cssClasses.length; j++) {
            var cssClass = svg.trim(cssClasses[j]);
            if (cssClass != '') {
              var props = svg.Styles[cssClass] || {};
              for (var k = 0; k < cssProps.length; k++) {
                var prop = cssProps[k].indexOf(':');
                var name = cssProps[k].substr(0, prop);
                var value = cssProps[k].substr(prop + 1, cssProps[k].length - prop);
                if (name != null && value != null) {
                  props[svg.trim(name)] = new svg.Property(svg.trim(name), svg.trim(value));
                }
              }
              svg.Styles[cssClass] = props;
              svg.StylesSpecificity[cssClass] = getSelectorSpecificity(cssClass);
              if (cssClass == '@font-face' && !nodeEnv) {
                var fontFamily = props['font-family'].value.replace(/"/g, '');
                var srcs = props['src'].value.split(',');
                for (var s = 0; s < srcs.length; s++) {
                  if (srcs[s].indexOf('format("svg")') > 0) {
                    var url = svg.ParseExternalUrl(srcs[s]);
                    if (url) {
                      var doc = svg.parseXml(svg.ajax(url));
                      var fonts = doc.getElementsByTagName('font');
                      for (var f = 0; f < fonts.length; f++) {
                        var font = svg.CreateElement(fonts[f]);
                        svg.Definitions[fontFamily] = font;
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    };
    svg.Element.style.prototype = new svg.Element.ElementBase;

    // use element
    svg.Element.use = function (node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);

      this.baseSetContext = this.setContext;
      this.setContext = function (ctx) {
        this.baseSetContext(ctx);
        if (this.attribute('x').hasValue()) ctx.translate(this.attribute('x').toPixels('x'), 0);
        if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').toPixels('y'));
      };

      var element = this.getHrefAttribute().getDefinition();

      this.path = function (ctx) {
        if (element != null) element.path(ctx);
      };

      this.elementTransform = function () {
        if (element != null && element.style('transform', false, true).hasValue()) {
          return new svg.Transform(element.style('transform', false, true).value);
        }
      };

      this.getBoundingBox = function (ctx) {
        if (element != null) return element.getBoundingBox(ctx);
      };

      this.renderChildren = function (ctx) {
        if (element != null) {
          var tempSvg = element;
          if (element.type == 'symbol') {
            // render me using a temporary svg element in symbol cases (http://www.w3.org/TR/SVG/struct.html#UseElement)
            tempSvg = new svg.Element.svg();
            tempSvg.type = 'svg';
            tempSvg.attributes['viewBox'] = new svg.Property('viewBox', element.attribute('viewBox').value);
            tempSvg.attributes['preserveAspectRatio'] = new svg.Property('preserveAspectRatio', element.attribute('preserveAspectRatio').value);
            tempSvg.attributes['overflow'] = new svg.Property('overflow', element.attribute('overflow').value);
            tempSvg.children = element.children;
          }
          if (tempSvg.type == 'svg') {
            // if symbol or svg, inherit width/height from me
            if (this.attribute('width').hasValue()) tempSvg.attributes['width'] = new svg.Property('width', this.attribute('width').value);
            if (this.attribute('height').hasValue()) tempSvg.attributes['height'] = new svg.Property('height', this.attribute('height').value);
          }
          var oldParent = tempSvg.parent;
          tempSvg.parent = null;
          tempSvg.render(ctx);
          tempSvg.parent = oldParent;
        }
      };
    };
    svg.Element.use.prototype = new svg.Element.RenderedElementBase;

    // mask element
    svg.Element.mask = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.apply = function (ctx, element) {
        // render as temp svg
        var x = this.attribute('x').toPixels('x');
        var y = this.attribute('y').toPixels('y');
        var width = this.attribute('width').toPixels('x');
        var height = this.attribute('height').toPixels('y');

        if (width == 0 && height == 0) {
          var bb = new svg.BoundingBox();
          for (var i = 0; i < this.children.length; i++) {
            bb.addBoundingBox(this.children[i].getBoundingBox(ctx));
          }
          var x = Math.floor(bb.x1);
          var y = Math.floor(bb.y1);
          var width = Math.floor(bb.width());
          var height = Math.floor(bb.height());
        }

        // temporarily remove mask to avoid recursion
        var mask = element.style('mask').value;
        element.style('mask').value = '';

        var cMask = createCanvas(x + width, y + height);
        var maskCtx = cMask.getContext('2d');
        svg.SetDefaults(maskCtx);
        this.renderChildren(maskCtx);

        // convert mask to alpha with a fake node
        // TODO: refactor out apply from feColorMatrix
        var cm = new svg.Element.feColorMatrix({
          nodeType: 1,
          childNodes: [],
          attributes: [
            { nodeName: 'type', value: 'luminanceToAlpha' },
            { nodeName: 'includeOpacity', value: 'true' },
          ]
        });
        cm.apply(maskCtx, 0, 0, x + width, y + height);

        var c = createCanvas(x + width, y + height);
        var tempCtx = c.getContext('2d');
        svg.SetDefaults(tempCtx);
        element.render(tempCtx);
        tempCtx.globalCompositeOperation = 'destination-in';
        tempCtx.fillStyle = maskCtx.createPattern(cMask, 'no-repeat');
        tempCtx.fillRect(0, 0, x + width, y + height);

        ctx.fillStyle = tempCtx.createPattern(c, 'no-repeat');
        ctx.fillRect(0, 0, x + width, y + height);

        // reassign mask
        element.style('mask').value = mask;
      };

      this.render = function (/* ctx */) {
        // NO RENDER
      };
    };
    svg.Element.mask.prototype = new svg.Element.ElementBase;

    // clip element
    svg.Element.clipPath = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.apply = function (ctx) {
        var hasContext2D = (typeof CanvasRenderingContext2D !== 'undefined');
        var oldBeginPath = ctx.beginPath;
        var oldClosePath = ctx.closePath;
        if (hasContext2D) {
          CanvasRenderingContext2D.prototype.beginPath = function () { };
          CanvasRenderingContext2D.prototype.closePath = function () { };
        }

        oldBeginPath.call(ctx);
        for (var i = 0; i < this.children.length; i++) {
          var child = this.children[i];
          if (typeof child.path != 'undefined') {
            var transform = typeof child.elementTransform != 'undefined' && child.elementTransform(); // handle <use />
            if (!transform && child.style('transform', false, true).hasValue()) {
              transform = new svg.Transform(child.style('transform', false, true).value);
            }
            if (transform) {
              transform.apply(ctx);
            }
            child.path(ctx);
            if (hasContext2D) {
              CanvasRenderingContext2D.prototype.closePath = oldClosePath;
            }
            if (transform) { transform.unapply(ctx); }
          }
        }
        oldClosePath.call(ctx);
        ctx.clip();
        if (hasContext2D) {
          CanvasRenderingContext2D.prototype.beginPath = oldBeginPath;
          CanvasRenderingContext2D.prototype.closePath = oldClosePath;
        }
      };

      this.render = function (/* ctx */) {
        // NO RENDER
      };
    };
    svg.Element.clipPath.prototype = new svg.Element.ElementBase;

    // filters
    svg.Element.filter = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.apply = function (ctx, element) {
        // render as temp svg
        var bb = element.getBoundingBox(ctx);
        var x = Math.floor(bb.x1);
        var y = Math.floor(bb.y1);
        var width = Math.floor(bb.width());
        var height = Math.floor(bb.height());

        // temporarily remove filter to avoid recursion
        var filter = element.style('filter').value;
        element.style('filter').value = '';

        var px = 0,
          py = 0;
        for (var i = 0; i < this.children.length; i++) {
          var efd = this.children[i].extraFilterDistance || 0;
          px = Math.max(px, efd);
          py = Math.max(py, efd);
        }

        var c = createCanvas(width + 2 * px, height + 2 * py);
        var tempCtx = c.getContext('2d');
        svg.SetDefaults(tempCtx);
        tempCtx.translate(-x + px, -y + py);
        element.render(tempCtx);

        // apply filters
        for (var i = 0; i < this.children.length; i++) {
          if (typeof this.children[i].apply == 'function') {
            this.children[i].apply(tempCtx, 0, 0, width + 2 * px, height + 2 * py);
          }
        }

        // render on me
        ctx.drawImage(c, 0, 0, width + 2 * px, height + 2 * py, x - px, y - py, width + 2 * px, height + 2 * py);

        // reassign filter
        element.style('filter', true).value = filter;
      };

      this.render = function (/* ctx */) {
        // NO RENDER
      };
    };
    svg.Element.filter.prototype = new svg.Element.ElementBase;

    svg.Element.feDropShadow = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);
      this.addStylesFromStyleDefinition();

      this.apply = function (/* ctx, x, y, width, height */) {
        // TODO: implement
      };
    };
    svg.Element.feDropShadow.prototype = new svg.Element.ElementBase;

    svg.Element.feMorphology = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.apply = function (/* ctx, x, y, width, height */) {
        // TODO: implement
      };
    };
    svg.Element.feMorphology.prototype = new svg.Element.ElementBase;

    svg.Element.feComposite = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.apply = function (/* ctx, x, y, width, height */) {
        // TODO: implement
      };
    };
    svg.Element.feComposite.prototype = new svg.Element.ElementBase;

    svg.Element.feColorMatrix = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      var matrix = svg.ToNumberArray(this.attribute('values').value);
      switch (this.attribute('type').valueOrDefault('matrix')) { // http://www.w3.org/TR/SVG/filters.html#feColorMatrixElement
        case 'saturate':
          var s = matrix[0];
          matrix = [0.213 + 0.787 * s, 0.715 - 0.715 * s, 0.072 - 0.072 * s, 0, 0,
          0.213 - 0.213 * s, 0.715 + 0.285 * s, 0.072 - 0.072 * s, 0, 0,
          0.213 - 0.213 * s, 0.715 - 0.715 * s, 0.072 + 0.928 * s, 0, 0,
            0, 0, 0, 1, 0,
            0, 0, 0, 0, 1
          ];
          break;
        case 'hueRotate':
          var a = matrix[0] * Math.PI / 180.0;
          var c = function (m1, m2, m3) { return m1 + Math.cos(a) * m2 + Math.sin(a) * m3; };
          matrix = [c(0.213, 0.787, -0.213), c(0.715, -0.715, -0.715), c(0.072, -0.072, 0.928), 0, 0,
          c(0.213, -0.213, 0.143), c(0.715, 0.285, 0.140), c(0.072, -0.072, -0.283), 0, 0,
          c(0.213, -0.213, -0.787), c(0.715, -0.715, 0.715), c(0.072, 0.928, 0.072), 0, 0,
            0, 0, 0, 1, 0,
            0, 0, 0, 0, 1
          ];
          break;
        case 'luminanceToAlpha':
          matrix = [0, 0, 0, 0, 0,
            0, 0, 0, 0, 0,
            0, 0, 0, 0, 0,
            0.2125, 0.7154, 0.0721, 0, 0,
            0, 0, 0, 0, 1
          ];
          break;
      }

      function imGet(img, x, y, width, height, rgba) {
        return img[y * width * 4 + x * 4 + rgba];
      }

      function imSet(img, x, y, width, height, rgba, val) {
        img[y * width * 4 + x * 4 + rgba] = val;
      }

      function m(i, v) {
        var mi = matrix[i];
        return mi * (mi < 0 ? v - 255 : v);
      }

      var includeOpacity = this.attribute('includeOpacity').hasValue();
      this.apply = function (ctx, x, y, width, height) {
        // assuming x==0 && y==0 for now
        var srcData = ctx.getImageData(0, 0, width, height);
        for (var y = 0; y < height; y++) {
          for (var x = 0; x < width; x++) {
            var r = imGet(srcData.data, x, y, width, height, 0);
            var g = imGet(srcData.data, x, y, width, height, 1);
            var b = imGet(srcData.data, x, y, width, height, 2);
            var a = imGet(srcData.data, x, y, width, height, 3);
            var nr = m(0, r) + m(1, g) + m(2, b) + m(3, a) + m(4, 1);
            var ng = m(5, r) + m(6, g) + m(7, b) + m(8, a) + m(9, 1);
            var nb = m(10, r) + m(11, g) + m(12, b) + m(13, a) + m(14, 1);
            var na = m(15, r) + m(16, g) + m(17, b) + m(18, a) + m(19, 1);
            if (includeOpacity) {
              nr = ng = nb = 0;
              na *= a / 255;
            }
            imSet(srcData.data, x, y, width, height, 0, nr);
            imSet(srcData.data, x, y, width, height, 1, ng);
            imSet(srcData.data, x, y, width, height, 2, nb);
            imSet(srcData.data, x, y, width, height, 3, na);
          }
        }
        ctx.clearRect(0, 0, width, height);
        ctx.putImageData(srcData, 0, 0);
      };
    };
    svg.Element.feColorMatrix.prototype = new svg.Element.ElementBase;

    svg.Element.feGaussianBlur = function (node) {
      this.base = svg.Element.ElementBase;
      this.base(node);

      this.blurRadius = Math.floor(this.attribute('stdDeviation').numValue());
      this.extraFilterDistance = this.blurRadius;

      this.apply = function (ctx, x, y, width, height) {
        if (!stackblurCanvas || typeof stackblurCanvas.canvasRGBA === 'undefined') {
          svg.log('ERROR: StackBlur.js must be included for blur to work');
          return;
        }

        // StackBlur requires canvas be on document
        ctx.canvas.id = svg.UniqueId();
        {
          ctx.canvas.style.display = 'none';
          doc.body.appendChild(ctx.canvas);
        }
        stackblurCanvas.canvasRGBA(ctx.canvas, x, y, width, height, this.blurRadius);
        {
          doc.body.removeChild(ctx.canvas);
        }
      };
    };
    svg.Element.feGaussianBlur.prototype = new svg.Element.ElementBase;

    // title element, do nothing
    svg.Element.title = function (/* node */) { };
    svg.Element.title.prototype = new svg.Element.ElementBase;

    // desc element, do nothing
    svg.Element.desc = function (/* node */) { };
    svg.Element.desc.prototype = new svg.Element.ElementBase;

    svg.Element.MISSING = function (node) {
      svg.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.');
    };
    svg.Element.MISSING.prototype = new svg.Element.ElementBase;

    // element factory
    svg.CreateElement = function (node) {
      var className = node.nodeName.replace(/^[^:]+:/, ''); // remove namespace
      className = className.replace(/\-/g, ''); // remove dashes
      var e = null;
      if (typeof svg.Element[className] != 'undefined') {
        e = new svg.Element[className](node);
      } else {
        e = new svg.Element.MISSING(node);
      }

      e.type = node.nodeName;
      return e;
    };

    // load from url
    svg.load = function (ctx, url) {
      svg.loadXml(ctx, svg.ajax(url));
    };

    // load from xml
    svg.loadXml = function (ctx, xml) {
      svg.loadXmlDoc(ctx, svg.parseXml(xml));
    };

    svg.loadXmlDoc = function (ctx, dom) {
      svg.init(ctx);

      var mapXY = function (p) {
        var e = ctx.canvas;
        while (e) {
          p.x -= e.offsetLeft;
          p.y -= e.offsetTop;
          e = e.offsetParent;
        }
        if (windowEnv.scrollX) p.x += windowEnv.scrollX;
        if (windowEnv.scrollY) p.y += windowEnv.scrollY;
        return p;
      };

      // bind mouse
      if (svg.opts['ignoreMouse'] != true) {
        ctx.canvas.onclick = function (e) {
          var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
          svg.Mouse.onclick(p.x, p.y);
        };
        ctx.canvas.onmousemove = function (e) {
          var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
          svg.Mouse.onmousemove(p.x, p.y);
        };
      }

      var e = svg.CreateElement(dom.documentElement);
      e.root = true;
      e.addStylesFromStyleDefinition();

      // render loop
      var isFirstRender = true;
      var draw = function () {
        svg.ViewPort.Clear();
        if (ctx.canvas.parentNode) {
          svg.ViewPort.SetCurrent(ctx.canvas.parentNode.clientWidth, ctx.canvas.parentNode.clientHeight);
        } else {
          svg.ViewPort.SetCurrent(defaultClientWidth, defaultClientHeight);
        }

        if (svg.opts['ignoreDimensions'] != true && (isFirstRender || (svg.opts['scaleWidth'] == null && svg.opts['scaleHeight'] == null))) {
          // set canvas size
          if (e.style('width').hasValue()) {
            ctx.canvas.width = e.style('width').toPixels('x');
            if (ctx.canvas.style) { ctx.canvas.style.width = ctx.canvas.width + 'px'; }
          }
          if (e.style('height').hasValue()) {
            ctx.canvas.height = e.style('height').toPixels('y');
            if (ctx.canvas.style) { ctx.canvas.style.height = ctx.canvas.height + 'px'; }
          }
        }
        var cWidth = ctx.canvas.clientWidth || ctx.canvas.width;
        var cHeight = ctx.canvas.clientHeight || ctx.canvas.height;
        if (svg.opts['ignoreDimensions'] == true && e.style('width').hasValue() && e.style('height').hasValue()) {
          cWidth = e.style('width').toPixels('x');
          cHeight = e.style('height').toPixels('y');
        }
        svg.ViewPort.SetCurrent(cWidth, cHeight);

        if (svg.opts['offsetX'] != null) e.attribute('x', true).value = svg.opts['offsetX'];
        if (svg.opts['offsetY'] != null) e.attribute('y', true).value = svg.opts['offsetY'];
        if (svg.opts['scaleWidth'] != null || svg.opts['scaleHeight'] != null) {
          var xRatio = null,
            yRatio = null,
            viewBox = svg.ToNumberArray(e.attribute('viewBox').value);

          if (svg.opts['scaleWidth'] != null) {
            if (e.attribute('width').hasValue()) xRatio = e.attribute('width').toPixels('x') / svg.opts['scaleWidth'];
            else if (!isNaN(viewBox[2])) xRatio = viewBox[2] / svg.opts['scaleWidth'];
          }

          if (svg.opts['scaleHeight'] != null) {
            if (e.attribute('height').hasValue()) yRatio = e.attribute('height').toPixels('y') / svg.opts['scaleHeight'];
            else if (!isNaN(viewBox[3])) yRatio = viewBox[3] / svg.opts['scaleHeight'];
          }

          if (xRatio == null) { xRatio = yRatio; }
          if (yRatio == null) { yRatio = xRatio; }

          e.attribute('width', true).value = svg.opts['scaleWidth'];
          e.attribute('height', true).value = svg.opts['scaleHeight'];
          e.style('transform', true, true).value += ' scale(' + (1.0 / xRatio) + ',' + (1.0 / yRatio) + ')';
        }

        // clear and render
        if (svg.opts['ignoreClear'] != true) {
          ctx.clearRect(0, 0, cWidth, cHeight);
        }
        e.render(ctx);
        if (isFirstRender) {
          isFirstRender = false;
          if (typeof svg.opts['renderCallback'] == 'function') svg.opts['renderCallback'](dom);
        }
      };

      var waitingForImages = true;
      if (svg.ImagesLoaded()) {
        waitingForImages = false;
        draw();
      }
      {
        //In node, in the most cases, we don't need the animation listener.
        svg.intervalID = setInterval(function () {
          var needUpdate = false;

          if (waitingForImages && svg.ImagesLoaded()) {
            waitingForImages = false;
            needUpdate = true;
          }

          // need update from mouse events?
          if (svg.opts['ignoreMouse'] != true) {
            needUpdate = needUpdate || svg.Mouse.hasEvents();
          }

          // need update from animations?
          if (svg.opts['ignoreAnimation'] != true) {
            for (var i = 0; i < svg.Animations.length; i++) {
              var needAnimationUpdate = svg.Animations[i].update(1000 / svg.FRAMERATE);
              needUpdate = needUpdate || needAnimationUpdate;
            }
          }

          // need update from redraw?
          if (typeof svg.opts['forceRedraw'] == 'function') {
            if (svg.opts['forceRedraw']() == true) needUpdate = true;
          }

          // render if needed
          if (needUpdate) {
            draw();
            svg.Mouse.runEvents(); // run and clear our events
          }
        }, 1000 / svg.FRAMERATE);
      }
    };

    svg.stop = function () {
      if (svg.intervalID) {
        clearInterval(svg.intervalID);
      }
    };

    svg.Mouse = new (function () {
      this.events = [];
      this.hasEvents = function () { return this.events.length != 0; };

      this.onclick = function (x, y) {
        this.events.push({
          type: 'onclick',
          x: x,
          y: y,
          run: function (e) { if (e.onclick) e.onclick(); }
        });
      };

      this.onmousemove = function (x, y) {
        this.events.push({
          type: 'onmousemove',
          x: x,
          y: y,
          run: function (e) { if (e.onmousemove) e.onmousemove(); }
        });
      };

      this.eventElements = [];

      this.checkPath = function (element, ctx) {
        for (var i = 0; i < this.events.length; i++) {
          var e = this.events[i];
          if (ctx.isPointInPath && ctx.isPointInPath(e.x, e.y)) this.eventElements[i] = element;
        }
      };

      this.checkBoundingBox = function (element, bb) {
        if (!bb) {
          return;
        }

        for (var i = 0; i < this.events.length; i++) {
          var e = this.events[i];
          if (bb.isPointInBox(e.x, e.y)) this.eventElements[i] = element;
        }
      };

      this.runEvents = function () {
        svg.ctx.canvas.style.cursor = '';

        for (var i = 0; i < this.events.length; i++) {
          var e = this.events[i];
          var element = this.eventElements[i];
          while (element) {
            e.run(element);
            element = element.parent;
          }
        }

        // done running, clear
        this.events = [];
        this.eventElements = [];
      };
    });

    return svg;
  }

  if (typeof CanvasRenderingContext2D != 'undefined') {
    CanvasRenderingContext2D.prototype.drawSvg = function (s, dx, dy, dw, dh, opts) {
      var cOpts = {
        ignoreMouse: true,
        ignoreAnimation: true,
        ignoreDimensions: true,
        ignoreClear: true,
        offsetX: dx,
        offsetY: dy,
        scaleWidth: dw,
        scaleHeight: dh
      };

      for (var prop in opts) {
        if (opts.hasOwnProperty(prop)) {
          cOpts[prop] = opts[prop];
        }
      }
      canvg(this.canvas, s, cOpts);
    };
  }

  // for tests
  canvg._build = build;

  module.exports = canvg;
  });

  return canvg_1;

})));
